"iff" meaning in English

See iff in All languages combined, or Wiktionary

Conjunction

IPA: /ɪf ən(d) ˈəʊn.li ɪf/ [UK], /ɪf ən(d) ˈoʊn.li ɪf/ [US]
Head templates: {{head|en|conjunction}} iff
  1. (mathematics, logic) Short for if and only if. Tags: abbreviation, alt-of Alternative form of: if and only if Categories (topical): Logic, Mathematics Related terms: if Translations (abbreviation of if and only if): hviss (Danish), desda (Dutch), joss (Finnish), ssi (French), gdw. (German), אםם (Hebrew), acsa (Hungarian), hviss (Norwegian), wtw (Polish), sse (Portuguese), sss (Portuguese), ddacă (Romanian), титтк (tittk) (Russian), sii (Spanish), omm (Swedish)
    Sense id: en-iff-en-conj-B6ERmww2 Categories (other): English entries with incorrect language header Topics: human-sciences, logic, mathematics, philosophy, sciences
The following are not (yet) sense-disambiguated
Etymology number: 1

Conjunction

IPA: /ɪf ən(d) ˈəʊn.li ɪf/ [UK], /ɪf ən(d) ˈoʊn.li ɪf/ [US]
Head templates: {{head|en|conjunction}} iff
  1. Obsolete spelling of if. Tags: alt-of, obsolete Alternative form of: if
    Sense id: en-iff-en-conj-nJOlVNny
The following are not (yet) sense-disambiguated
Etymology number: 2

Download JSON data for iff meaning in English (3.6kB)

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        "1": "en",
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      "expansion": "iff",
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  "lang": "English",
  "lang_code": "en",
  "pos": "conj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "if and only if"
        }
      ],
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Logic",
          "orig": "en:Logic",
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            "Philosophy",
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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            "Entry maintenance"
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          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "A rectangle is a square iff all four of its sides have the same length."
        }
      ],
      "glosses": [
        "Short for if and only if."
      ],
      "id": "en-iff-en-conj-B6ERmww2",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
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          "if and only if",
          "if and only if#English"
        ]
      ],
      "raw_glosses": [
        "(mathematics, logic) Short for if and only if."
      ],
      "related": [
        {
          "word": "if"
        }
      ],
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        "abbreviation",
        "alt-of"
      ],
      "topics": [
        "human-sciences",
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      "translations": [
        {
          "code": "da",
          "lang": "Danish",
          "sense": "abbreviation of if and only if",
          "word": "hviss"
        },
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "abbreviation of if and only if",
          "word": "desda"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "abbreviation of if and only if",
          "word": "joss"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "abbreviation of if and only if",
          "word": "ssi"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "abbreviation of if and only if",
          "word": "gdw."
        },
        {
          "code": "he",
          "lang": "Hebrew",
          "sense": "abbreviation of if and only if",
          "word": "אםם"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "abbreviation of if and only if",
          "word": "acsa"
        },
        {
          "code": "no",
          "lang": "Norwegian",
          "sense": "abbreviation of if and only if",
          "word": "hviss"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "abbreviation of if and only if",
          "word": "wtw"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "abbreviation of if and only if",
          "word": "sse"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "abbreviation of if and only if",
          "word": "sss"
        },
        {
          "code": "ro",
          "lang": "Romanian",
          "sense": "abbreviation of if and only if",
          "word": "ddacă"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "tittk",
          "sense": "abbreviation of if and only if",
          "word": "титтк"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "abbreviation of if and only if",
          "word": "sii"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "abbreviation of if and only if",
          "word": "omm"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɪf ən(d) ˈəʊn.li ɪf/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ɪf ən(d) ˈoʊn.li ɪf/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "iff"
}

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  "lang_code": "en",
  "pos": "conj",
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    {
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      ],
      "categories": [],
      "examples": [
        {
          "ref": "1565, Thomas Stapleton, A Fortreſſe of the Faith &c., Ihon Laet, the 2. part. 112",
          "text": "For iff the patient be aſhamed to diſcloſe hiſ wounde to the phyſician which knoweth it not , phyſicke can not helpe him."
        }
      ],
      "glosses": [
        "Obsolete spelling of if."
      ],
      "id": "en-iff-en-conj-nJOlVNny",
      "links": [
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          "if",
          "if#English"
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    {
      "ipa": "/ɪf ən(d) ˈəʊn.li ɪf/",
      "tags": [
        "UK"
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    {
      "ipa": "/ɪf ən(d) ˈoʊn.li ɪf/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "iff"
}
{
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    "English terms with IPA pronunciation"
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      ],
      "examples": [
        {
          "text": "A rectangle is a square iff all four of its sides have the same length."
        }
      ],
      "glosses": [
        "Short for if and only if."
      ],
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        "(mathematics, logic) Short for if and only if."
      ],
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  "sounds": [
    {
      "ipa": "/ɪf ən(d) ˈəʊn.li ɪf/",
      "tags": [
        "UK"
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    },
    {
      "ipa": "/ɪf ən(d) ˈoʊn.li ɪf/",
      "tags": [
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  ],
  "translations": [
    {
      "code": "da",
      "lang": "Danish",
      "sense": "abbreviation of if and only if",
      "word": "hviss"
    },
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "abbreviation of if and only if",
      "word": "desda"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "abbreviation of if and only if",
      "word": "joss"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "abbreviation of if and only if",
      "word": "ssi"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "abbreviation of if and only if",
      "word": "gdw."
    },
    {
      "code": "he",
      "lang": "Hebrew",
      "sense": "abbreviation of if and only if",
      "word": "אםם"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "abbreviation of if and only if",
      "word": "acsa"
    },
    {
      "code": "no",
      "lang": "Norwegian",
      "sense": "abbreviation of if and only if",
      "word": "hviss"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "abbreviation of if and only if",
      "word": "wtw"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "abbreviation of if and only if",
      "word": "sse"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "abbreviation of if and only if",
      "word": "sss"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "abbreviation of if and only if",
      "word": "ddacă"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "tittk",
      "sense": "abbreviation of if and only if",
      "word": "титтк"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "abbreviation of if and only if",
      "word": "sii"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "abbreviation of if and only if",
      "word": "omm"
    }
  ],
  "word": "iff"
}

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    "English lemmas",
    "English terms with IPA pronunciation"
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  "lang": "English",
  "lang_code": "en",
  "pos": "conj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "if"
        }
      ],
      "categories": [
        "English obsolete forms"
      ],
      "examples": [
        {
          "ref": "1565, Thomas Stapleton, A Fortreſſe of the Faith &c., Ihon Laet, the 2. part. 112",
          "text": "For iff the patient be aſhamed to diſcloſe hiſ wounde to the phyſician which knoweth it not , phyſicke can not helpe him."
        }
      ],
      "glosses": [
        "Obsolete spelling of if."
      ],
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          "if",
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        ]
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  "sounds": [
    {
      "ipa": "/ɪf ən(d) ˈəʊn.li ɪf/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ɪf ən(d) ˈoʊn.li ɪf/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "iff"
}

This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2024-04-17 from the enwiktionary dump dated 2024-04-01 using wiktextract (0b52755 and 5cb0836). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

If you use this data in academic research, please cite Tatu Ylonen: Wiktextract: Wiktionary as Machine-Readable Structured Data, Proceedings of the 13th Conference on Language Resources and Evaluation (LREC), pp. 1317-1325, Marseille, 20-25 June 2022. Linking to the relevant page(s) under https://kaikki.org would also be greatly appreciated.