extramarital

adjective

ex·​tra·​mar·​i·​tal ˌek-strə-ˈmer-ə-tᵊl 

-ˈma-rə-

: of, relating to, or being sexual intercourse between a married person and someone who is not that person's spouse : adulterous

an extramarital affair

Synonyms of extramarital

• adulterous
• extracurricular

Examples of extramarital in a Sentence

she had several extramarital affairs with coworkers

Recent Examples on the Web

This status quo starts to change when Ruthie gets pregnant via extramarital affair and moves to New York to figure out her life. — Alison Herman, Variety, 8 Sep. 2026

The book, and subsequently the movie, follow Diana’s extramarital affair with her former riding instructor, Captain James Hewitt. — Giovana Gelhoren, InStyle, 23 Aug. 2026

There has never been any real question of extramarital affairs. — Abigail Van Buren, Mercury News, 18 Aug. 2026

Sanford appeared to be on a trajectory for higher office when a very public extramarital affair in 2009 derailed that. — Gavin Jackson, NPR, 11 Aug. 2026

Word History

First Known Use

1925, in the meaning defined above

Rhymes for extramarital

• marital
• nonmarital
• premarital

Kids Definition

extramarital

adjective

ex·​tra·​mar·​i·​tal ˌek-strə-ˈmar-ət-ᵊl 

: of or relating to sexual intercourse between a married person and someone other than his or her spouse