favourite2 British English ; favorite American English [countable]
something that you like more than other things of the same kind :
Can we have strawberries? They're my favourite.
an old/firm/particular favourite
a sweater that's an old favorite
Dahl's books are firm favourites with children.
someone who is liked and treated better than others by a teacher or parent:
You always were Dad's favourite.
play favorites American English (=treat one person better than others)➔ favouritism
The manager insisted he doesn't play favorites.