collar (Noun) — A band that fits around the neck and is usually folded over.
collar (Noun) — (zoology) an encircling band or marking around the neck of any animal.
collar (Noun) — Anything worn or placed about the neck. ex. "the thief was forced to wear a heavy wooden collar" ex. "a collar of flowers was placed about the neck of the winning horse"
collar (Noun) — A short ring fastened over a rod or shaft to limit, guide, or secure a machine part.
collar (Noun) — The stitching that forms the rim of a shoe or boot.
collar (Noun) — A band of leather or rope that is placed around an animal's neck as a harness or to identify it.
collar (Noun) — Necklace that fits tightly around a woman's neck.
collar (Noun) — A figurative restraint. ex. "asked for a collar on program trading in the stock market"
collar (Noun) — The act of apprehending (especially apprehending a criminal). ex. "the policeman on the beat got credit for the collar"
collar (Verb) — Take into custody. ex. "the police collared the suspected criminals"
collar (Verb) — Seize by the neck or collar.
collar (Verb) — Furnish with a collar. ex. "collar the dog"