their

their /ˈðeɚ/ /ðɚ/ adjective
their
/ˈðeɚ/ /ðɚ/
adjective
Britannica Dictionary definition of THEIR
possessive form of they
always used before a noun
1 
: relating to or belonging to certain people, animals, or things
: made or done by certain people, animals, or things
2 
: his or her : his : her : its — used to refer to a single person whose sex is not known or specified