Dictionary and Thesaurus

Definition of Improper

• (a.) Not proper; not suitable; not fitted to the circumstances, design, or end; unfit; not becoming; incongruous; inappropriate; indecent; as, an improper medicine; improper thought, behavior, language, dress.
• (a.) Not peculiar or appropriate to individuals; general; common.
• (a.) Not according to facts; inaccurate; erroneous.
• (v. t.) To appropriate; to limit.

Synonyms of Improper

• Unconventional
• Unlawful
• Wrong

Antonyms of Improper

• Proper

Homophones of Improper