Breadcrumb Home > Thesaurus > I Synonyms of indoor Find synonyms for: Adjective 1. indoor(prenominal) (vs. outdoor), interior usage: located, suited for, or taking place within a building; "indoor activities for a rainy day"; "an indoor pool" 2. indoor, interior (vs. exterior) usage: within doors; "an indoor setting" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of indoor (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: insitu Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language