1. equivalent to the sum of one and two; one more than two; 3: "her three children"
▪ a group or unit of three people or things: "students clustered in twos or threes"
▪ three years old: "she is only three"
▪ three o'clock: "I'll come at three"
▪ a size of garment or other merchandise denoted by three.
▪ a playing card or domino with three pips.
Word OriginOld Englishthrīe (masculine), thrīo, thrēo (feminine), of Germanic origin; related to Dutch drie and German drei, from an Indo-European root shared by Latin tres and Greek treis.