adj.
Pronunciation: ( ˌ )im- ' prä-p ə r
Function: adjective
Etymology: Middle English, from Middle French impropre, from Latin improprius, from in- + proprius proper
Date: 15th century
: not proper: as a : not in accord with fact, truth, or right procedure : INCORRECT < improper inference> b : not regularly or normally formed or not properly so called c : not suited to the circumstances, design, or end < improper medicine> d : not in accord with propriety, modesty, good manners, or good taste < improper language>
synonyms see INDECOROUS
– im · prop · er · ly adverb
– im · prop · er · ness noun