proper adjective

noun

, Grammar.

1. an adjective formed from a proper noun, as American from America.

Word History and Origins

Origin of proper adjective¹

First recorded in 1900–05

Example Sentences

Notice the form assumed by the surface of the water in each case and apply the proper adjective: convex, concave.

From Project Gutenberg

They should always be spelled out when preceded by a proper adjective.

From Project Gutenberg