(intransitive, Britain) To act as a "stag", an irregular dealer in stocks. / (transitive) To watch; to dog, or keep track of.

Of a man, attending a formal social function without a date.

A large pile of hay, grain, straw, or the like, larger at the bottom than the top, sometimes covered with thatch. / A pile of similar objects, each directly on top of the last.

(transitive) To arrange in a stack, or to add to an existing stack. / (transitive, card games) To arrange the cards in a deck in a particular manner.

Arranged in a stack. / (slang) Having large breasts. / (slang) Having large muscles; buff. / (slang) Unfairly constructed, as a stacked deck of cards.

simple past tense and past participle of stack

An unsteady movement of the body in walking or standing as if one were about to fall; a reeling motion.

(intransitive) In standing or walking, to sway from one side to the other as if about to fall; to stand or walk unsteadily; to reel or totter. / (transitive) To cause to reel or totter.

(UK) One who attends a stag night.

(economics) Inflation accompanied by stagnant growth, unemployment or recession.