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Synonyms

inmate

American  
[in-meyt] / ˈɪnˌmeɪt /

noun

inmates plural
  1. a person who is confined in a prison, hospital, etc.

  2. Archaic. a person who dwells with others in the same house.


inmate British  
/ ˈɪnˌmeɪt /

noun

  1. a person who is confined to an institution such as a prison or hospital See also resident

  2. obsolete a person who lives with others in a house

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of inmate

First recorded in 1580–90; in- 1 + mate 1

Compare meaning

How does inmate compare to similar and commonly confused words? Explore the most common comparisons:

Explanation

An inmate is a person who lives in a specific place, especially someone who's confined there, like a prisoner. You can call yourself an Inmate if you get sent to your room, but usually inmates are behind bars in "the big house." You can talk about a hospital inmate or the inmates at a local boarding school, but it's most common to use inmate and prisoner interchangeably. Originally, in the 16th century, an inmate was "one allowed to live in a house rented by another" — a roommate who's not on the lease, in other words. This meaning comes from in and mate, "friend or companion." By the 1830s, inmate had come to mean "one confined to an institution."

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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.

And, as Jackson noted, a prison subject to an injunction can easily transfer an inmate to another facility that is not bound by the order.

From Slate • Jun. 23, 2026

He was booked into the Men’s Central Jail in Los Angeles County on Friday, according to inmate records.

From Los Angeles Times • Jun. 16, 2026

A two-year-old boy's adoption has been overturned after his adoptive mother failed to disclose she was in a relationship with an inmate at the prison where she worked.

From BBC • May 11, 2026

A visit to a pasticceria program at a high-security Padua prison—where the recidivism rate for inmate bakers, we are told, is only 10%—is not so much about food as it is about Italy itself.

From The Wall Street Journal • May 7, 2026

Boxcar and another inmate went to look for a second car, taking White with them.

From "Killers of the Flower Moon" by David Grann

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