indecorous, improper, unseemly, unbecoming, indelicate mean not conforming to what is accepted as right, fitting, or in good taste. indecorous suggests a violation of accepted …

Improper definition: not proper; not strictly belonging, applicable, correct, etc.; erroneous.. See examples of IMPROPER used in a sentence.

improper adjective (WRONG) unsuitable or not correct for a particular use or occasion: improper prescription of medicines

Definition of improper adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. not proper; not strictly belonging, applicable, or correct: drew improper conclusions. 2. not in accordance with propriety or regulations: improper conduct. 3. abnormal; irregular.

If you describe someone's behaviour as improper, you mean that it is rude or shocking.

Nov 30, 2025 · improper (comparative more improper, superlative most improper) Unsuitable to needs or circumstances; inappropriate; inapt. Not in keeping with conventional mores or good …