1 a concern; a business; a matter to be attended to (that is my affair).
2 a a celebrated or notorious happening or sequence of events. b colloq. a noteworthy thing or event (was a puzzling affair).
3 = love affair.
4 (in pl.) a ordinary pursuits of life. b business dealings. c public matters (current affairs).
Etymology: ME f. AF afere f. OF afaire f. agrave faire to do: cf. ADO
Useful english dictionary. 2012.