stag

1. An adult male deer, especially a red deer and especially one in high adulthood versus a young adult. (countable)
2. An improperly or late castrated bull or ram – also called a bull seg (see note under ox). (countable)
3. An outside irregular dealer in stocks, who is not a member of the exchange. (countable)
4. 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. (countable)
5. An unmarried man; a bachelor; a man not accompanying a woman at a social event. (countable) · a stag dance; a stag party; a stag bar
6. 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. (countable) · The stag will be held in the hotel's ballroom.
7. A man who allows his wife to have sex with other men. (colloquial, countable, uncountable)
8. An informer. (countable, slang)

Plural stags