adulterous
Americanadjective
adjective
-
of, characterized by, or inclined to adultery
-
an obsolete word for adulterate
Usage
What does adulterous mean? Adulterous is used to describe a person who engages in or a relationship that constitutes adultery—a consensual sexual relationship or encounter between someone who’s married and a person they’re not married to (who may or may not be married to someone else). In other words, adultery can be between two people who are both married to other people, or between a married person and a nonmarried person. Typically, for something to be considered adulterous, at least one of the partners must be married. On the other hand, similar words like cheating, infidelity, and unfaithfulness can be used regardless of whether either person is married—they simply refer to a (usually sexual) relationship or encounter between people when one or both of them is in a committed relationship with someone else. When it happens with someone other than one’s spouse, a long-term relationship (often called an affair), a single sexual encounter, or anything in between can be considered adulterous. In some cases, a relationship may even be considered adulterous when it’s nonsexual but intimate (this is sometimes called an emotional affair). The words adultery and adulterous are especially used in a religious context, in which adultery is often considered a sin. The word adultery is also sometimes used in a legal context, such as during divorce proceedings. Adultery is associated with a considerable amount of stigma. The word adulterous is always used negatively and implies a critical judgment of such actions. Someone who participates in adultery can be called an adulterer. The word adulteress specifically refers to a woman who has engaged in adultery. (It has been more common throughout history for women to be called adulterous and to be blamed and punished for adulterous relationships than men.)Example: Just because it only happened once doesn’t mean it wasn’t adulterous.
Other Word Forms
Etymology
Origin of adulterous
First recorded in 1400–50; adulter(y) + -ous; replacing late Middle English avoutrious, advouterose
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
As if thunderstruck, Leontes becomes irredeemably convinced that Polixenes’ acquiescence reveals an adulterous relationship between the two.
From The Wall Street Journal ● Aug. 12, 2026
In Townsend’s speech as Matthews, he also notes two sources of pain that have made him a better artist: his adulterous fiancée and selfish brother.
From Los Angeles Times ● Oct. 15, 2025
It was to Mr. Badinter that Mr. Mitterrand turned in 1984 to countersign, in strict secrecy, the document in which the president recognized Mazarine Pingeot, his daughter from an adulterous relationship.
From New York Times ● Feb. 9, 2024
I feel like the message of Jesus is clearly one of love—the adulterous woman in the Gospel of John, “You who are without sin cast the first stone.”
From Slate ● Feb. 1, 2024
So this is what happened to the man who liberated the adulterous woman.
From "You Bring the Distant Near" by Mitali Perkins
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
