(idiomatic) Two equivalent choices or situations.

Third-person singular simple present indicative form of less than three

(baseball) The recording of three outs in an inning without allowing a batter to reach first base.

The cardinal number after twenty-two and before twenty-four.

(card games) A hand including three cards of the same rank.

Yarn having three strands

Alternative form of triple-decker (“type of sandwich”) / Alternative form of triple-decker (“type of bus”) / Alternative form of triple-decker (“type of apartment building”)

Having three strands or layers

Three of four equal parts (3/4, ¾, 0.75).

(rugby) A player positioned between the half-backs and the full-backs (properly a three-quarter back) / (only in singular) A fraction with three of four equal parts (=75 %)