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The definition of improper

3 Definitions of: improper

1. adjective, lacking propriety; not seemly or fitting
2. adjective, unsuitable for a certain use or occasion; inappropriate
3. adjective, irregular or abnormal
4. Show me some examples of this word: improper
5. Show me the etymology of the word: improper

Synonyms:	unfit, unwarranted, incongruous, ill-timed, uncalled-for, unseasonable, inapt, infelicitous, inapposite, malapropos	And more...
Antonyms:	appropriate, decent

From Collins