Found 2 items, similar to improver.
English → English (WordNet) Definition: improver improver n 1: someone devoted to the promotion of human welfare and to social reforms [syn: humanitarian, do-gooder] 2: a component that is added to something to improve it; “the addition of a bathroom was a major improvement”; “the addition of cinammon improved the flavor” [syn: addition, add-on]
English → English (gcide) Definition: Improver Improver \Im*prov"er\, n. One who, or that which, improves. [1913 Webster]