improper applies to a broader range of transgressions of rules not only of social behavior but of ethical practice or logical procedure or prescribed method.

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

improper adjective (WRONG) not suitable or correct for a particular use or situation: an improper choice of words

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

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. …

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

How does the adjective improper differ from other similar words? Some common synonyms of improper are indecorous, indelicate, unbecoming, and unseemly.

There are five meanings listed in OED's entry for the adjective improper, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

It would be improper for me to ask such a favor of her. He made some improper remarks. He came to school improperly dressed. She pronounced the word improperly.