INDE'CENCY, noun [Latin indecens, indeceo; in and deceo, to become.] That which is unbecoming in language or manners; any action or behavior which is deemed a violation of modesty, or an offense to delicacy, as rude or wanton actions, obscene language, and whatever tends to excite a blush in a spectator. Extreme assurance or impudence may also be deemed indecency of behavior towards superiors. [See Indecorum.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI