Entry 2 senses · 2 variants Webster, 1913 Hatter /(-tẽr)/ · Hat·ter · IPA /ˈhætə(ɹ)/ v. t. n. 01 v. t. To tire or worry; -- with out. 1. To tire or worry; -- with out.[Obs.] 02 n. One who makes or sells hats. 1. One who makes or sells hats.