collar · noun C /ˈkɒl.ər/
collar (PART OF CLOTHES)
B1 the part of a shirt, coat, etc. that is usually folded over and goes round your neck
Dictionary examples:
a shirt collar
a fur collar
Learner example:
It's a new, fashionable one with [a] high collar and short sleeves. (Preliminary English Test; B1; Thai)
collar (ON AN ANIMAL)
B2 a strap made of leather or other strong material which is put around the neck of an animal, especially a dog or cat
Dictionary examples:
a dog collar
I grabbed the dog by its collar and dragged it out of the room.