(golf) A hole that is completed by sinking the ball in a single shot or attempt, with one hit. / (by extension, idiomatic) Any rare, wonderful, or remarkable accomplishment.

(idiomatic) Alone; by oneself; without the companionship or assistance of others.

(cricket) The act of a batsman, running between the wickets, failing to ground himself or his bat behind the popping crease before turning for another run; the umpire's signal indicating this (the run does not count).

A short joke, especially one of a single sentence. / A short remark intended as a sound bite. / (computing) A command or small program consisting of a single line of input.

(idiomatic) Drunk; in the act of consuming alcohol liberally.

(US, colloquial) murder in the first degree.

In a situation which is entirely suitable, familiar, or enjoyable.

(idiomatic) First; foremost; best, often used after its headword.

The most important person, the one who is in charge. / Someone who is top of a ranking, who is ranked first. / Oneself, being considered foremost, as by an egoist.

(idiomatic) Attentive, active, busy or alert.