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improper

adjective (WRONG)
 
 
/ɪmˈprɒp.ər/ US  /-ˈprɑː.pɚ/ formal

Definition

unsuitable or not correct for a particular use or occasion: improper prescription of medicines Is it considered improper to wear such a short skirt to a formal occasion?Unsuitable and unacceptable improperly
 
 
/-li/ adverb formal
(Definition of improper adjective (WRONG) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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