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Definition of ouster

ouster

/ˈaʊ.stɚ/
ous · ter
Plural:ousters
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ouster Lexical Profile

ouster Game Scores & Validity

• noun

1

The expulsion or removal of a person from a position of power, office, or leadership.

Example

"The board of directors voted unanimously for the ouster of the company's chief executive after the financial scandal."

2

In property law, the wrongful dispossession or exclusion of a rightful owner or tenant from real property.

Example

"Changing the locks without notice constituted an unlawful ouster of the commercial tenant from the premises."

Synonyms
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Antonyms
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Word Nuance & Usage

Although ending in '-er', 'ouster' most commonly denotes the act of expelling someone from office rather than the person who performs the expulsion (a usage inherited from an Anglo-French legal infinitive noun).

• Rhymes for ouster

• Nearby Words

ourselves
ouse
oust
ouster
out
out of
out of sight

Word Origin & Etymology

Borrowed in the 16th century from Anglo-French 'ouster' (meaning 'to remove' or 'dispossess'), where the infinitive verb was used directly as a legal noun; ultimately from Latin 'obstare', meaning 'to stand in the way of' or 'obstruct'.

Cite this Entry

Wordmom. (2026). Definition of Ouster. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/ouster
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