From Middle English hat, from Old English hæt (“head-covering, hat”), from Proto-Germanic *hattuz (“hat”), from Proto-Indo-European *kadʰ- (“to guard, cover, care for, protect”). Cognate with North Frisian hat (“hat”), Danish hat (“hat”), Swedish hatt (“hat”), Icelandic hattur (“hat”), Latin cassis (“helmet”), Lithuanian kudas (“bird's crest or tuft”), Avestan ????? (xaoda, “hat”), Welsh caddu (“to provide for, ensure”). Compare also hood.
hat (plural hats)
- A covering for the head, often in the approximate form of a cone or a cylinder closed at its top end, and sometimes having a brim and other decoration.
- (figuratively) A particular role or capacity that a person might fill.
- (figuratively) Any receptacle from which numbers/names are pulled out in a lottery.
- (figuratively, by extension) The lottery or draw itself.
- (video games) A hat switch.
- (typography, nonstandard, rare) The háček symbol.
- (programming, informal) The caret symbol ^.
- (Internet slang) User rights on a website, such as the right to edit pages others cannot.
- (Cambridge University slang, obsolete) A student who is also the son of a nobleman (and so allowed to wear a hat instead of a mortarboard).
hat (third-person singular simple present hats, present participle hatting, simple past and past participle hatted)
- (transitive) To place a hat on.
- (transitive) To appoint as cardinal.
- (Scotland, Northern England or obsolete) simple past tense of hit