1. (noun) impropriety, improperness
an improper demeanor
Synonyms: impropriety, liberty, indecorum, improperness, familiarity, indecency
Antonyms: properness, correctitude, propriety
2. (noun) impropriety
the condition of being improper
Synonyms: liberty, indecorum, improperness, familiarity, indecency
Antonyms: propriety, properness, correctitude
3. (noun) indecency, impropriety
an indecent or improper act
Synonyms: impropriety, liberty, indecorum, improperness, familiarity, indecency
Antonyms: propriety, correctitude, properness
4. (noun) familiarity, impropriety, indecorum, liberty
an act of undue intimacy
Synonyms: intimacy, indecency, autonomy, casualness, conversancy, closeness, indecorousness, liberty, familiarity, indecorum, impropriety, acquaintance, shore leave, conversance, improperness
Antonyms: correctitude, properness, propriety
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Synonyms for impropriety 
