Definition of "stag"

(countable) An adult male deer, especially a red deer.  examples

(countable, chiefly Scotland) A young horse (colt or filly).  examples

(by extension, countable, obsolete) A romping girl; a tomboy.

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

(countable, finance) An outside irregular dealer in stocks, who is not a member of the exchange.  examples

(countable, finance) 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.  examples

(countable, usually attributive) An unmarried man; a bachelor; a man not accompanying a woman at a social event.  examples

(countable) 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.  examples

(countable, slang) An informer.  quotations

(uncountable, UK, military, slang) Guard duty.  quotations

(countable) A stag beetle (family Lucanidae).  quotations  examples

(countable) The Eurasian wren, Troglodytes troglodytes.  examples

(intransitive, Britain) To act as a "stag", an irregular dealer in stocks.  examples

(transitive) To watch; to dog, or keep track of.  examples

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