other man

American  

noun

1. a man who is romantically or sexually involved with another man's wife or lover, especially a man who is having an affair with a married woman.

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Etymology

Origin of other man

First recorded in 1885–90

Example Sentences

Linden had claimed he thought the other man was interested in him.

From BBC

The jury have heard that many traces of DNA recovered from the scene cannot be said to conclusively match Quinn - but one specific sample, recovered from the woman's vest, is a billion times more likely to have come from him than any other man.

From BBC

The other man, after getting to his feet, appears to continue scolding Ritchson before the actor and his family drive off.

From Los Angeles Times

The amiability drained from the other man’s face.

From Literature

Through the turmoil inside me, I realized it was important for the other man to believe him.

From Literature