(informal) A T-shirt. / Tuesday. / Thursday. / (music) Tenor. / (automotive) The Ford Motor Company's Model T automobile. / (rail transport, in multiple unit formations) Trailer car.

The twentieth letter of the English alphabet, called tee and written in the Latin script.

(stock ticker symbol) AT&T.

(ratings) Teen. / (finance) Taxable. / American Library Association abbreviation of twentieth, a book size range (12.5-15 cm in height).

The ordinal number twentieth, derived from this letter of the English alphabet, called tee and written in the Latin script.

(of a topological space) Such that, for any two of its points, there exist respective open sets containing each and not the other.

(idiomatic) Alternative form of to a T

(Internet slang, 4chan, abbreviation) Used as a way of signing off posts. Typically followed by an occupation, nationality, or field of expertise. These can sometimes be satirical, to imply said poster is being disingenuous.

(organic chemistry) tertiary form

(business) time and attendance reporting.