5 very common adjective (1) noun (1) adjective 1. being one more than four Synonymsfivev Similarcardinal noun 1. the cardinal number that is the sum of four and one SynonymsfiveVcinquequintquintetfivesomequintupletpentadfinPhoebeLittle Phoebe Related words Broader terms digit WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.