1
[ adjective ] not suitable or right or appropriate

Examples

"slightly improper to dine alone with a married man" "improper medication"

2
[ adjective ] not conforming to legality, moral law, or social convention

Examples

"an unconventional marriage" "improper banking practices"

Related terms

irregular

3
[ adjective ] not appropriate for a purpose or occasion

Synonyms

wrong unsuitable

Examples

"unsuitable attire for the office" "said all the wrong things"

Related terms

inappropriate

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