Meanings
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1
noun
lack of proper behavior, manners, or good taste; impropriety
The committee was embarrassed by the indecorum of shouting during the memorial.
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2
noun
an act or instance of improper or unseemly behavior
Wearing muddy boots into the chapel was regarded as an indecorum.
Thesaurus
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Word family
Etymology
A learned borrowing from Latin indecorum, the neuter of indecorus ("unseemly, improper"), formed from in- ("not") + decorus ("fitting, becoming"). It is the direct negative counterpart of decorum.