Pronunciation (US) IPA (key): /ɪnˈtɪriɚ/ (UK) IPA (key): /ɪnˈtɪərɪə/ Audio (US)(file) Adjective Positive interior Comparative none Superlative none The interior of something is located at the inner part of it. Antonym: exterior the interior apartments of a house; the interior surface of a hollow ball Noun Singular interior Plural interiors (countable) An interior is the inside of an enclosed structure.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads