twosome(noun, adjective) adjective1. Being or constituting a pair; two.2. Twofold; double.3. Performed by two individuals.- a twosome dance noun1. two items of the same kindSimilar word(s): brace, couple, couplet, distich, duad, duet, duo, dyad, pair, span, twain, yokeDefinition categories: quantity, deuce, two2. a pair who associate with one another- an inseparable twosomeSimilar word(s): couple, duet, duoDefinition categories: group, pair