plural of three-center two-electron bond

Alternative form of one fry short of a Happy Meal

A guest who overstays will cease to be welcome.

A countdown prior to exerting some effort, such as launching a burden or running a race.

Alternative form of one for the money, two for the show, three to make ready, and four to go

A group of three people or things. / An instance of sexual activity involving three people.

three times as great / triple

by a factor of three

(mathematics) An algebraic variety of dimension 3.

(narratology) The chronologically third part of any series of works, especially a movie trilogy.