"arrow of time" meaning in English

See arrow of time in All languages combined, or Wiktionary

Noun

Forms: arrows of time [plural]
Etymology: Reported coined in 1927. Head templates: {{en-noun|arrows of time}} arrow of time (plural arrows of time)
  1. (physics) The direction of time within a four-dimensional relativistic view of the cosmos. Categories (topical): Physics, Relativity, Time Synonyms: time's arrow Translations (direction of time in 4D): ajan nuoli (Finnish), strzałka czasu [feminine] (Polish), seta do tempo [feminine] (Portuguese), săgeata timpului (Romanian)
    Sense id: en-arrow_of_time-en-noun-RSrm1ux7 Disambiguation of Relativity: 74 7 19 Disambiguation of Time: 100 0 0 Categories (other): English entries with incorrect language header Disambiguation of English entries with incorrect language header: 69 16 15 Topics: natural-sciences, physical-sciences, physics Disambiguation of 'direction of time in 4D': 95 3 2
  2. (philosophy) The subjective feeling of movement from past to future. Categories (topical): Philosophy
    Sense id: en-arrow_of_time-en-noun-VBvhfPhU Topics: human-sciences, philosophy, sciences
  3. Entropy.
    Sense id: en-arrow_of_time-en-noun-~pcMySGh

Inflected forms

Alternative forms

Download JSON data for arrow of time meaning in English (2.7kB)

{
  "etymology_text": "Reported coined in 1927.",
  "forms": [
    {
      "form": "arrows of time",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "arrows of time"
      },
      "expansion": "arrow of time (plural arrows of time)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "69 16 15",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "74 7 19",
          "kind": "topical",
          "langcode": "en",
          "name": "Relativity",
          "orig": "en:Relativity",
          "parents": [
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "100 0 0",
          "kind": "topical",
          "langcode": "en",
          "name": "Time",
          "orig": "en:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The direction of time within a four-dimensional relativistic view of the cosmos."
      ],
      "id": "en-arrow_of_time-en-noun-RSrm1ux7",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "direction",
          "direction"
        ],
        [
          "time",
          "time"
        ],
        [
          "four-dimensional",
          "four-dimensional"
        ],
        [
          "relativistic",
          "relativistic"
        ],
        [
          "cosmos",
          "cosmos"
        ]
      ],
      "raw_glosses": [
        "(physics) The direction of time within a four-dimensional relativistic view of the cosmos."
      ],
      "synonyms": [
        {
          "_dis1": "100 0 0",
          "word": "time's arrow"
        }
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "translations": [
        {
          "_dis1": "95 3 2",
          "code": "fi",
          "lang": "Finnish",
          "sense": "direction of time in 4D",
          "word": "ajan nuoli"
        },
        {
          "_dis1": "95 3 2",
          "code": "pl",
          "lang": "Polish",
          "sense": "direction of time in 4D",
          "tags": [
            "feminine"
          ],
          "word": "strzałka czasu"
        },
        {
          "_dis1": "95 3 2",
          "code": "pt",
          "lang": "Portuguese",
          "sense": "direction of time in 4D",
          "tags": [
            "feminine"
          ],
          "word": "seta do tempo"
        },
        {
          "_dis1": "95 3 2",
          "code": "ro",
          "lang": "Romanian",
          "sense": "direction of time in 4D",
          "word": "săgeata timpului"
        }
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Philosophy",
          "orig": "en:Philosophy",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The subjective feeling of movement from past to future."
      ],
      "id": "en-arrow_of_time-en-noun-VBvhfPhU",
      "links": [
        [
          "philosophy",
          "philosophy"
        ],
        [
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          "subjective"
        ],
        [
          "past",
          "past"
        ],
        [
          "future",
          "future"
        ]
      ],
      "raw_glosses": [
        "(philosophy) The subjective feeling of movement from past to future."
      ],
      "topics": [
        "human-sciences",
        "philosophy",
        "sciences"
      ]
    },
    {
      "glosses": [
        "Entropy."
      ],
      "id": "en-arrow_of_time-en-noun-~pcMySGh",
      "links": [
        [
          "Entropy",
          "entropy"
        ]
      ]
    }
  ],
  "wikipedia": [
    "Entropy (arrow of time)",
    "arrow of time"
  ],
  "word": "arrow of time"
}
{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "en:Relativity",
    "en:Time"
  ],
  "etymology_text": "Reported coined in 1927.",
  "forms": [
    {
      "form": "arrows of time",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "arrows of time"
      },
      "expansion": "arrow of time (plural arrows of time)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Physics"
      ],
      "glosses": [
        "The direction of time within a four-dimensional relativistic view of the cosmos."
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "direction",
          "direction"
        ],
        [
          "time",
          "time"
        ],
        [
          "four-dimensional",
          "four-dimensional"
        ],
        [
          "relativistic",
          "relativistic"
        ],
        [
          "cosmos",
          "cosmos"
        ]
      ],
      "raw_glosses": [
        "(physics) The direction of time within a four-dimensional relativistic view of the cosmos."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    },
    {
      "categories": [
        "en:Philosophy"
      ],
      "glosses": [
        "The subjective feeling of movement from past to future."
      ],
      "links": [
        [
          "philosophy",
          "philosophy"
        ],
        [
          "subjective",
          "subjective"
        ],
        [
          "past",
          "past"
        ],
        [
          "future",
          "future"
        ]
      ],
      "raw_glosses": [
        "(philosophy) The subjective feeling of movement from past to future."
      ],
      "topics": [
        "human-sciences",
        "philosophy",
        "sciences"
      ]
    },
    {
      "glosses": [
        "Entropy."
      ],
      "links": [
        [
          "Entropy",
          "entropy"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "time's arrow"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "direction of time in 4D",
      "word": "ajan nuoli"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "direction of time in 4D",
      "tags": [
        "feminine"
      ],
      "word": "strzałka czasu"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "direction of time in 4D",
      "tags": [
        "feminine"
      ],
      "word": "seta do tempo"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "direction of time in 4D",
      "word": "săgeata timpului"
    }
  ],
  "wikipedia": [
    "Entropy (arrow of time)",
    "arrow of time"
  ],
  "word": "arrow of time"
}

This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2024-05-03 from the enwiktionary dump dated 2024-05-02 using wiktextract (f4fd8c9 and c9440ce). 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.