interior decoration or interior design noun

The construction and furnishing of the interior of a building

interior decorator or interior designer noun

A person or company that specializes in the design and furnishing of interiors

interior grate noun

An open grate with built-in boiler

interior monologue noun

A literary representation of a person's inner thoughts and feelings before they take coherent grammatical form

interˈior-sprung adjective

(of a mattress, etc) containing springs