Definition of proper adjective in English:

proper adjective

Syllabification: prop·er ad·jec·tive

noun

An adjective, typically capitalized, derived from a proper noun.
More example sentences
  • Its trademarks should never be used in the possessive or plural form, but should be introduced as a proper adjective followed by an appropriate descriptor.

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal