4. [OE.; cf. Icel. titter a tit or small bird. The word probably meant
originally, something small, and is perhaps the same as teat. Cf.
Titmouse, Tittle.] (Zoöl.) (a) Any one of numerous species of small
singing birds belonging to the families Paridæ and Leiotrichidæ; a
titmouse. (b) The European meadow pipit; a titlark.
Ground tit. (Zoöl.) See Wren tit, under Wren. — Hill tit (Zoöl.), any
one of numerous species of Asiatic singing birds belonging to Siva,
Milna, and allied genera. — Tit babbler (Zoöl.), any one of several
species of small East Indian and Asiatic timaline birds of the genus
Trichastoma. — Tit for tat. [Probably for tip for tap. See Tip a slight
blow.] An equivalent; retaliation. — Tit thrush (Zoöl.), any one of
numerous species of Asiatic and East Indian birds belonging to Suthora
and allied genera. In some respects they are intermediate between the
thrushes and titmice.
Ti"tan (?), a. Titanic.
The Titan physical difficulties of his enterprise.