1. equivalent to the sum of one and one; one less than three; 2: "two years ago"
▪ a group or unit of two people or things: "they would straggle home in ones and twos"
▪ two years old: "he is only two"
▪ two o'clock: "the pub closed at two"
▪ a size of garment or other merchandise denoted by two.
▪ a playing card or domino with two pips.
Word OriginOld Englishtwā (feminine and neuter) of Germanic origin; related to Dutch twee and German zwei, from an Indo-European root shared by Latin and Greek duo. Compare with twain.