What is the meaning of Stag?

An adult male deer, especially a red deer and especially one in high adulthood versus a young adult.

A young horse (colt or filly).

A male turkey: a turkeycock.

A romping girl; a tomboy.

An improperly or late castrated bull or ram – also called a bull seg (see note under ox).

An outside irregular dealer in stocks, who is not a member of the exchange.

One who applies for the allotment of shares in new projects, with a view to sell immediately at a premium, and not to hold the stock.

An unmarried man; a bachelor; a man not accompanying a woman at a social event.

A social event for men held in honor of a groom on the eve of his wedding, attended by male friends of the groom; sometimes a fundraiser.

An informer.

Guard duty.

A stag beetle (family Lucanidae).

The Eurasian wren, Troglodytes troglodytes.

To act as a "stag", an irregular dealer in stocks.

To watch; to dog, or keep track of.

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

Alternative form of stagge

first/third-person singular preterite indicative of stīgan

a stay

an appliance with a function similar to a nautical stay

Source: wiktionary.org