(zoology) an encircling band or marking around the neck of any animal
"The zebra's distinctive black and white collar stands out against its striped body."
anything worn or placed about the neck
"the thief was forced to wear a heavy wooden collar"
"a collar of flowers was placed about the neck of the winning horse"
a short ring fastened over a rod or shaft to limit, guide, or secure a machine part
"The mechanic installed a collar on the drive shaft to prevent the pulley from sliding off."
the stitching that forms the rim of a shoe or boot
"The cobbler carefully reinforced the collar of his leather boots to prevent them from cracking after weeks of walking in rain."
a band of leather or rope that is placed around an animal's neck as a harness or to identify it
"The farmer fastened a heavy leather collar around the ox's neck before attaching the plow."
necklace that fits tightly around a woman's neck
"She wore an elegant diamond collar that fit tightly around her neck."
the act of apprehending (especially apprehending a criminal)
"the policeman on the beat got credit for the collar"
Anything that encircles the neck.
"The tight collar of his suit jacket dug into his skin."
The part of an upper garment (shirt, jacket, etc.) that fits around the neck and throat, especially if sewn from a separate piece of fabric.
"The stiff white collar on his dress shirt stood out sharply against his dark jacket."
In plain English: A collar is the stiff band of fabric that goes around your neck on a shirt to keep it from falling down or getting dirty.
"He adjusted his white dress collar before going out to dinner."
Usage: Use "collar" to refer specifically to the band at the neckline of a shirt or jacket rather than any circular object around the neck. When describing clothing, distinguish this from synonyms like "neckline," which refers generally to the cut where the garment meets the throat without implying a separate fabric piece.
seize by the neck or collar
"The angry cat lunged forward and bit the sleeve of his jacket, but he managed to grab it by the fur at its neck before it could scratch him."
To grab or seize by the collar or neck.
"The security guard rushed forward and grabbed the thief by the collar to stop his escape."
In plain English: To collar someone means to grab them by their necktie or shirt and hold onto them tightly, usually as part of an arrest or rough physical confrontation.
"The police officer asked him to remove his collar before they could search for identification."
A surname.
"The famous footballer John Collar scored a hat-trick in his home game last night."
The word "collar" comes from the Latin word collum, which means "neck." It entered English through Middle English and Old French, originally referring to something worn around the neck.