From The Collaborative International Dictionary of English v.0.48:
Hat \Hat\,
sing. pres. of Hote to be called. Cf. Hatte. [Obs.] "That
one hat abstinence." --Piers Plowman.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Hat \Hat\ (h[a^]t), n. [AS. h[ae]t, h[ae]tt; akin to Dan. hat,
Sw. hatt, Icel. hattr a hat, h["o]ttr hood, D. hoed hat, G.
hut, OHG. huot, and prob. to L. cassis helmet. [root]13. Cf.
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.
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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. [Colloq.] --Lowell.
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From The Collaborative International Dictionary of English v.0.48:
Hat \Hat\ (h[aum]t), a.
Hot. [Obs.] --Chaucer.
[1913 Webster]