2 very common adjective (1) noun (1) adjective 1. being one more than one “he received two messages” Synonymstwoii Similarcardinal noun 1. the cardinal number that is the sum of one and one or a numeral representing this number SynonymstwoIIdeuce Related words Broader terms digit Narrower terms crapscouple WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.