their
Americanpronoun
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a form of the possessive case of plural they used as an attributive adjective, before a noun.
their home;
their rights as citizens;
their departure for Rome.
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a form of the possessive case of singular they used as an attributive adjective, before a noun.
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(used to refer to a generic or unspecified person previously mentioned, about to be mentioned, or present in the immediate context): A parent should read to their child.
Someone left their book on the table.
A parent should read to their child.
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(used to refer to a specific or known person previously mentioned, about to be mentioned, or present in the immediate context).
I’m glad my teacher last year had high expectations for their students.
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(used to refer to a nonbinary or gender-nonconforming person previously mentioned, about to be mentioned, or present in the immediate context).
My cousin Sam is bad at math, but their other grades are good.
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determiner
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of, belonging to, or associated in some way with them
their finest hour
their own clothes
she tried to combat their mocking her
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belonging to or associated in some way with people in general not including the speaker or people addressed
in many countries they wash their clothes in the river
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belonging to or associated in some way with an indefinite antecedent such as one, whoever, or anybody
everyone should bring their own lunch
Grammar
Usage
What’s the difference between their, there, and they're? Their is the possessive form of the personal pronoun they, essentially meaning belonging to or possessed by them, as in Is that their car, or ours? There is commonly used to introduce sentences or to indicate where something is, as in It’s over there, next to the window. They're is a contraction of they are. There are many instances in which they’re confused because their pronunciations are exactly the same. (See what we did there?)There are easy ways to remember which spelling is right, and they’re actually built into each word. You can remember that their is the one that’s used to show possession (like his and her) by remembering that it includes the word heir (a person who inherits possessions). When it’s used to indicate location, there functions a lot like here (even though it can mean the opposite), and the word here is right inside of it. The apostrophe in they’re indicates that it’s a combination of two words and signals that it’s the one you want to use when you mean they are. Here’s an example of their, there, and they're used correctly in the same sentence. Example: It’s hard to work as a team in that environment—when they’re in there, they’re their own worst enemies. Want to learn more? Read the full breakdown of the difference between their, there, and they're.
Etymology
Origin of their
First recorded in 1150–1200; Middle English their(e), ther(e), from Old Norse theirra “their”; replacing Old English thāra, thǣra; cf. they
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.
She expressed gratitude to her friends, family, caregivers and medical teams for their support.
From Los Angeles Times ● Jul. 27, 2026
There is also an amazing collection of letters written primarily by Black parents to Union Army officials, asking for help freeing their children.
From Slate ● Jul. 27, 2026
Such controversies highlight the delicate balance facing brands hoping to attract younger audiences without alienating their core, longstanding customer base.
From BBC ● Jul. 27, 2026
Texts displayed in court late last week and early Monday morning showed they continued to talk in the months after, at times arguing over the status of their friendship and Burke’s relationships with other women.
From Los Angeles Times ● Jul. 27, 2026
Although the Americans leave Manila in the hands of the Japanese—temporarily, at least—and the Propaganda Corps works tirelessly to disseminate their messages, the Imperial Japanese Army struggles in the first months of the occupation.
From "At Last She Stood" by Erin Entrada Kelly
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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.