In'de-cō'rum, n.
n. [Prefix in, not, and decorum; Lat. indecorus, unbecoming. See supra.]
Sense 1. Want of decorum; impropriety of behavior; that in behavior or manners which violates the established rules of civility, or the duties of respect which age or station requires; indecorousness.
Sense 2. An indecorous or unbecoming action; a breach of decorum.
The soft address, the castigated grace, Are indecorums in the modern maid. Young.
Synonyms— Indecorum is sometimes synonymous with indecency; but indecency, more frequently than indecorum, is applied to words or actions which refer to what nature and propriety require to be concealed or suppressed.