Definition of they're in English:

they're

contraction

  • They are.

    • ‘They're already here!’
    • ‘They're very useful.’
    • ‘Women are more successful at infidelity than men - they're better liars.’
    • ‘The cheapness and ubiquity of plastics, and the problems caused when they're carelessly thrown away, blind us to the utility and versatility of these marvellously mutable materials.’
    • ‘I wonder if he'll complain if they're used against him.’
    • ‘If they're asking too many personal questions, it's okay not to answer.’

Usage

On the differences between their, they're, and there, see they

Pronunciation:

they're

/T͟Her/