A goal that is constantly changing

(military) A relatively small target requiring accurate placement of ordnance in order to neutralize or destroy it.

(pinball) A target which drops or is knocked over by the ball hitting it, often arranged in banks or sets of multiple adjacent drop targets.

(UK, RAF, slang) A girlfriend or lover.

(sports) A shot that either scores a goal or that would score if not for an obstruction by a defending player.

(military) A target onto which one's attack is diverted as soon as it is seen or becomes known. / (figuratively, by extension) An object to which one's efforts are diverted as soon as it becomes known.

plural of shot on target

(medicine, often attributively) A treatment strategy, chiefly used in rheumatology, that defines a measurable treatment target (such as clinical remission or low disease activity) and involves tight control and treatment adjustments until the chosen target is achieved.

A metric that estimates how well a television programme or advertisement reached its target audience

(linguistics) Of a linguistic feature produced by a language learner: unlike that linguistic feature as it occurs in the target language.