In machines, a collar is a ring or band that holds or supports parts. It fits tightly around a part to keep it in place.
The shaft was fixed with a metal collar.
They tightened the collar on the pipe.
In informal language, a collar means catching or arresting someone, usually by police. It is like holding someone tightly to stop them.
The gang got a collar last night.
He made a collar in the police chase.
In plants, the collar is where the stem meets the roots under the soil. It is important for plant growth and health.
Water the plant at the collar area.
The collar is important for root health.
A collar can be a piece of jewelry or decoration worn tightly around the neck. It is like a necklace or choker.
She wore a gold collar around her neck.
The collar necklace looked very nice.