Longman Dictionary of Contemporary English - affair

~ S2 W1 n 1 ~s plural a) public or political events and activities  (world affairs | They were accused of interfering in China's internal affairs. | the exclusion of women from public affairs) foreign ~s (=political events in other countries)  (a foreign affairs correspondent for the CNN) b) things connected with your personal life, your financial situation etc  (I am not prepared to discuss my financial affairs with the press.)  (- see also state of ~s (state1 (8))) 2 »EVENT« an event or set of related events, especially one that is impressive or shocking  (the Watergate affair | The dinner was an elegant affair.) 3 »RELATIONSHIP« a secret sexual relationship between two people, when at least one of them is married to someone else have an ~ (with)  (He had an affair with his boss that lasted six years.)  (- see also love affair) 4 »THING« informal an object, machine etc of a particular kind  (The computer was one of those little portable affairs.) 5 be sb's ~ if something is your affair, it only concerns you and you do not want anyone else to get involved in it  (What I do in my time is my affair and nobody else's.)