6 very common adjective (1) noun (1) adjective 1. denoting a quantity consisting of six items or units Synonymssixvihalf dozenhalf a dozen Similarcardinal noun 1. the cardinal number that is the sum of five and one SynonymssixVIsixersiseCaptain Hickshalf a dozensextetsestetsextuplethexad Related words Broader terms digit WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.