Dictionary

their

adjective \thər, ˈther\

: relating to or belonging to certain people, animals, or things : made or done by certain people, animals, or things

: his or her : his : her : its

Full Definition of THEIR

1
:  of or relating to them or themselves especially as possessors, agents, or objects of an action <their furniture> <their verses> <their being seen>
2
:  his or her :  his, her, its —used with an indefinite third person singular antecedent <anyone in their senses — W. H. Auden>
See Usage Discussion at they

Examples of THEIR

  1. All the furniture in their house is brand-new.
  2. They are on friendly terms with their neighbors.
  3. The students are seeking to exercise their rights.
  4. The birds have left their nest.
  5. The trees have all shed their leaves.
  6. Their artwork is on display at the museum.
  7. He was angry because of their arriving late.

Origin of THEIR

Middle English, from their, pron., from Old Norse theirra, genitive plural demonstrative & personal pron.; akin to Old English thæt that
First Known Use: 13th century
THEIR Defined for Kids

their

adjective \thər, ˈther\

Definition of THEIR for Kids

:  of or relating to them or themselves especially as owners or as agents or objects of an action <their clothes> <their deeds>

Headscratcher for THEIR

It's easy to mix up their, they're and there. Their and they're are both forms of the third person pronoun. Their means belonging to them. They're means they are. There is not related in meaning but means in that place. Here is a sentence that uses all three: They're on their way there.

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