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

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.

Definition of improper adjective from the Oxford Advanced Learner's Dictionary. dishonest, or morally wrong. He had been indulging in improper business practices. She was suspended for improper …

If you describe someone's behavior as improper, you mean it is rude or shocking or in some way socially unacceptable. Such improper behavior and language from a young lady left me momentarily …

Improper has a wide range, being applied to whatever is not suitable or fitting, and often specifically to what does not conform to the standards of conventional morality: improper diet; improper behavior in …

Jan 24, 2026 · improper (comparative more improper, superlative most improper) Unsuitable to needs or circumstances; inappropriate; inapt. Not in keeping with conventional mores or good manners; …

improper meaning, definition, what is improper: dishonest, illegal, or morally wrong: Learn more.

Definition of improper. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels.