Definitions from Wiktionary (Trey)

▸ noun:  A nickname for someone who is the third person in the family sharing his father's name.
▸ noun:  A male given name from English of modern usage, derived from the nickname.
▸ noun:  (card games, occasionally dice games) A playing card or die with the rank of three.
▸ noun:  (card games, dice games, dominoes) A score of three in cards, dice, or dominoes.
▸ noun:  (US, Canada, basketball, informal, obsolete) A three-pointer.
▸ noun:  (Australia, informal) A three penny coin; a thrippence.
▸ noun:  (informal) The third bearer of the same personal name in a family, often denoted by suffixed Roman numeral III.
▸ noun:  The third branch of a deer's antler.

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