Webster's Revised Unabridged Dictionary · 1913

Hat

Hat (hat) , adjective

Hot. [Obsolete] — Chaucer

Hat , sing. pres.

sing. pres. of Hote to be called. Compare [Obsolete]
That one hat abstinence. — Piers Plowman

Hat (hat) , noun

[Anglo-Saxon hat, hatt; akin to Danish hat, Swedish hatt, Icelandic hattr a hat, hottr hood, Dutch hoed hat, German hut, Old High German huot, and prob. to Latin cassis helmet. r13. Compare Hood.]

A covering for the head; esp., one with a crown and brim, made of various materials, and worn by men or women for protecting the head from the sun or weather, or for ornament.
Collocations (2)
Hat block , a block on which hats are formed or dressed.
To pass around the hat , to take up a collection of voluntary contributions, which are often received in a hat. [Colloquial] — Lowell