v (transitive|intransitive|photography|often with "up" or "down") To adjust the aperture of a camera lens.
n (linguistics) A consonant sound in which the passage of air through the mouth is temporarily blocked by the lips, tongue, or glottis.
n A symbol used for purposes of punctuation and representing a pause or separating clauses, particularly a full stop, comma, colon or semicolon.
n (tennis) A very short shot which touches the ground close behind the net and is intended to bounce as little as possible.