Quiz: Remember the definition of mal de mer?
mid-14c., "living together, having dealings with others," also "manner of conducting oneself in the world;" from Old French conversation, from Latin conversationem (nominative conversatio) "act of living with," noun of action from past participle stem of conversari "to live with, keep company with," literally "turn about with," from Latin com- "with" (see com-) + vertare, frequentative of vertere (see versus).
Specific sense of "talk" is 1570s. Used as a synonym for "sexual intercourse" from at least 1511, hence criminal conversation, legal term for adultery from late 18c. Related: Conversationalist; conversationist.
generally the goings out and in of social intercourse (Eph. 2:3; 4:22; R.V., "manner of life"); one's deportment or course of life. This word is never used in Scripture in the sense of verbal communication from one to another (Ps. 50:23; Heb. 13:5). In Phil. 1:27 and 3:20, a different Greek word is used. It there means one's relations to a community as a citizen, i.e., citizenship.