have an affair

have an affair (with someone)

to have a love affair with someone. When I was 20, I had an affair with a rock star, and really made a fool of myself.
See also: affair, have
References in periodicals archive ?
92% Of Lebanese Say That "Married People Having An Affair Is Morally Unacceptable" Only 47% of the French say it is morally unacceptable for married people to have an affair but as far as Lebanon is concerned, the study states that 92% of Lebanese say that married people having an affair is morally unacceptable.
A IT'S possible to have an affair and masturbate as well, so I don't believe you can rule it out.
Thank you, Ellen, for giving me a much-needed laugh that day at the pathetic irony of learning about "Ellen's Crazy New Life" as it was revealed how she juggles a successful TV career and strong lesbian relationship as well as apparently finding time to have an affair on the side.
Would you ever have an affair with your partner's best friend?