"brainteaser" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "brain",
        "3": "teaser"
      },
      "expansion": "brain + teaser",
      "name": "compound"
    }
  ],
  "etymology_text": "From brain + teaser.",
  "forms": [
    {
      "form": "brainteasers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "brainteaser (plural brainteasers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Czech translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Greek translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Swahili translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Swedish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A difficult problem or puzzle."
      ],
      "id": "en-brainteaser-en-noun-VWCXBWhB",
      "links": [
        [
          "problem",
          "problem"
        ],
        [
          "puzzle",
          "puzzle"
        ]
      ],
      "raw_glosses": [
        "(informal) A difficult problem or puzzle."
      ],
      "related": [
        {
          "word": "brainteasing"
        }
      ],
      "synonyms": [
        {
          "word": "brain teaser"
        },
        {
          "word": "brain-teaser"
        }
      ],
      "tags": [
        "informal"
      ],
      "translations": [
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "brainteaser",
          "tags": [
            "masculine"
          ],
          "word": "hlavolam"
        },
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "brainteaser",
          "tags": [
            "masculine"
          ],
          "word": "oříšek"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "Kopfnuss"
        },
        {
          "code": "de",
          "lang": "German",
          "note": "obsolete spelling",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "Kopfnuß"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "Denkaufgabe"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "Denksportaufgabe"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "harte Nuss"
        },
        {
          "code": "de",
          "lang": "German",
          "note": "obsolete spelling",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "harte Nuß"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "Knobelei"
        },
        {
          "code": "el",
          "lang": "Greek",
          "roman": "spazokefaliá",
          "sense": "brainteaser",
          "tags": [
            "feminine"
          ],
          "word": "σπαζοκεφαλιά"
        },
        {
          "code": "sw",
          "lang": "Swahili",
          "sense": "brainteaser",
          "word": "chemsha bongo"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "brainteaser",
          "word": "hjärngymnastik"
        }
      ]
    }
  ],
  "word": "brainteaser"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "brain",
        "3": "teaser"
      },
      "expansion": "brain + teaser",
      "name": "compound"
    }
  ],
  "etymology_text": "From brain + teaser.",
  "forms": [
    {
      "form": "brainteasers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "brainteaser (plural brainteasers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "brainteasing"
    }
  ],
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Czech translations",
        "Terms with German translations",
        "Terms with Greek translations",
        "Terms with Swahili translations",
        "Terms with Swedish translations"
      ],
      "glosses": [
        "A difficult problem or puzzle."
      ],
      "links": [
        [
          "problem",
          "problem"
        ],
        [
          "puzzle",
          "puzzle"
        ]
      ],
      "raw_glosses": [
        "(informal) A difficult problem or puzzle."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "brain teaser"
    },
    {
      "word": "brain-teaser"
    }
  ],
  "translations": [
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "brainteaser",
      "tags": [
        "masculine"
      ],
      "word": "hlavolam"
    },
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "brainteaser",
      "tags": [
        "masculine"
      ],
      "word": "oříšek"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "Kopfnuss"
    },
    {
      "code": "de",
      "lang": "German",
      "note": "obsolete spelling",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "Kopfnuß"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "Denkaufgabe"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "Denksportaufgabe"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "harte Nuss"
    },
    {
      "code": "de",
      "lang": "German",
      "note": "obsolete spelling",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "harte Nuß"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "Knobelei"
    },
    {
      "code": "el",
      "lang": "Greek",
      "roman": "spazokefaliá",
      "sense": "brainteaser",
      "tags": [
        "feminine"
      ],
      "word": "σπαζοκεφαλιά"
    },
    {
      "code": "sw",
      "lang": "Swahili",
      "sense": "brainteaser",
      "word": "chemsha bongo"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "brainteaser",
      "word": "hjärngymnastik"
    }
  ],
  "word": "brainteaser"
}