mutually exclusive

American  

[myoo-choo-uh-lee ik-skloo-siv, -ziv] / ˈmyu tʃu ə li ɪkˈsklu sɪv, -zɪv /

adjective

1. of or relating to a situation involving two or more events, possibilities, etc., in which the occurrence of one precludes the occurrence of the other.

   mutually exclusive plans of action.

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Usage

What does mutually exclusive mean? Describing two things as mutually exclusive means that they can’t both exist, be true, or happen at the same time. In most cases, the phrase implies that one of the things prevents the other from happening or being true, or that both things prevent each other from happening or being true. Mutually exclusive is often used in negative constructions about things that are said to be not mutually exclusive—meaning they can both happen or be true at the same time. Example: Kindness and a good business sense are not mutually exclusive—it’s possible to be financially successful without being a jerk.

Etymology

Origin of mutually exclusive

First recorded in 1870–75

Example Sentences

The president’s threats suggest they weren’t so mutually exclusive after all.

From Slate • Apr. 8, 2026

“We don’t see software and semis being mutually exclusive, but for many the question becomes, ‘Why bother with software if semis are going to outperform on an absolute and relative basis?’”

From MarketWatch • Apr. 6, 2026

The uncomfortable reality is that these two sets of details aren’t necessarily mutually exclusive.

From The Wall Street Journal • Jan. 8, 2026

And if recent years have taught us anything, it’s that these things are not mutually exclusive.

From Los Angeles Times • May 30, 2025

I think he sensed my frustration at living in mutually exclusive worlds and thought a game of baseball would bring together my neighborhood friends and my wealthier Riverdale classmates and broaden the horizons of both.

From "The Other Wes Moore: One Name, Two Fates" by Wes Moore