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

(idiomatic) To do something pointless or insignificant that will soon be overtaken by events, or that contributes nothing to the solution of a current problem.

(transitive, slang) To flirt with; to approach and speak to (someone), seeking romance, love, sex, etc. / (transitive, idiomatic) To discover, pinpoint; to think up; to realize.

(idiomatic) In understanding or in the ability to absorb new information; especially in the phrases "quick on the uptake" and "slow on the uptake".

(of a door) Closed but not locked, so that it can be opened by operating the latch.

(idiomatic) Self-righteous; proceeding on the belief one is more correct or proper than others.

A student athlete who wants to try out for a college sports/athletic team without the benefit of a scholarship or having been recruited.

Very nearly; imminent; close.

(law) approximately.

(slang, idiomatic) a descriptive analogy of closeness. See like white on rice.