their S1 W1 / ðə ; strong ðeə $ ðər strong ðer / determiner [ possessive form of ‘they’ ]

1 belonging to or connected with people or things that have already been mentioned :

They washed their faces and went to bed.

The twins spend all their time together.

People had moved back into their own homes.

2 used when talking about someone who may be male or female, to avoid saying ‘his or her’ :

Everyone is free to express their own opinion.

Each student will have their own course-work folder.

→ his ( 2 )