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• ex
  ex

  preposition

  without, not including, or without the right to have.
• EX
  EX

  abbreviation

  extinct.
• ex-
  ex-

  a prefix meaning “out of,” “from,” and hence “utterly,” “thoroughly,” and sometimes meaning “not” or “without” or indicating a former title, status, etc.; freely used as an English formative: exstipulate; exterritorial; ex-president (former president); ex-member; ex-wife .
• ex.
  ex.

  abbreviation

  examination.
• Ex.
  Ex.

  abbreviation

  Exodus.

ex

¹ American  

[eks] / ɛks /

preposition

1. Finance. without, not including, or without the right to have.

   ex interest; ex rights.

2. Commerce. free of charges to the purchaser until the time of removal from a specified place or thing.

   ex ship; ex warehouse; ex elevator.

3. (in U.S. colleges and universities) from, but not graduated with, the class of.

   ex '47.

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ex ² American  

[eks] / ɛks /

noun

Informal.

1. a former spouse or a former partner in a long-term romantic relationship; ex-wife, ex-husband, or ex-lover.

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ex ³ American  

[eks] / ɛks /

noun

1. the letter X, x.

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ex ⁴ American  

[eks] / ɛks /

adjective

Slang.

1. excellent.

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EX ⁵ American  

abbreviation

1. Biology, Ecology. extinct.

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ex- ⁶ American  

1. a prefix meaning “out of,” “from,” and hence “utterly,” “thoroughly,” and sometimes meaning “not” or “without” or indicating a former title, status, etc.; freely used as an English formative: exstipulate; exterritorial; ex-president (former president); ex-member; ex-wife .

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ex- ⁷ American  

1. variant of exo-.

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ex- ⁸ American  

1. a prefix identical in meaning with ex- 1, occurring before vowels in words of Greek origin: exarch; exegesis .

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ex. ⁹ American  

abbreviation

1. examination.

2. examined.

3. example.

4. except.

5. exception.

6. exchange.

7. excursion.

8. executed.

9. executive.

10. express.

11. extra.

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Ex. ¹⁰ American  

abbreviation

Bible.

1. Exodus.

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ex- ¹ British  

prefix

1. out of; outside of; from

   exclosure

   exurbia

2. former

   ex-wife

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ex ² British  

/ ɛks /

preposition

1. finance not participating in; excluding; without

   ex bonus

   ex dividend

   ex rights

2. commerce without charge to the buyer until removed from

   ex quay

   ex ship

   ex works

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ex ³ British  

/ ɛks /

noun

1. informal (a person's) former wife, husband, etc

2. short for examination

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Ex. ⁴ British  

abbreviation

1. Exodus

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ex- ⁵ British  

combining form

1. a variant of exo-

   exergonic

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Etymology

Origin of ex¹

First recorded in 1835–45; from Latin; see ex- ¹

Origin of ex²

First recorded in 1820–30; by shortening

Origin of ex⁴

First recorded in 1920–25; by shortening

Origin of ex-⁶

< Latin, combining form of ex, ē (preposition) out (of ), from, beyond

Origin of ex-⁸

From Greek combining form of ex, ek, “out (of), from, beyond”; see ec-, ex- ¹

Example Sentences

No relevant precedent existed, and given the unique crimes the Nazi hierarchy had committed, it would require ex post facto laws to prosecute them.

From Salon • May 18, 2026

A generous interpretation: It may be that your ex finds the monthly payments stressful.

From MarketWatch • May 16, 2026

This one was a new, more casual ex he briefly dated earlier in the year.

From Los Angeles Times • May 15, 2026

And I guess I’m curious about why this is done in the language of We’re tweaking, we’re doing tiny fixes, we’re restoring us to the status quo ex ante.

From Slate • Apr. 30, 2026

It was creatio ex nihilo, despite the Aristotelian ban on the vacuum.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife

Related Words

• earlier
• past
• preceding