From Longman Dictionary of Contemporary Englishcollarcol‧lar1 /ˈkɒlə $ ˈkɑːlər/ ●●● S3 noun [countable] 1 clothingCLOTHINGDC the part of a shirt, coat etc that fits around your neck, and is usually folded over He grabbed me by the collar. He loosened his collar and tie.2 
cat/dogCAT/DOGDHP a narrow band of leather or plastic that is fastened around an animal’s neck3 injured neck an object that someone wears around their neck to support it when it has been injured4 business a way of making sure that stocks you own do not lose money, even if their price goes down5 machineMACHINETE a circular ring that goes round a pipe to make it stronger, especially where two pipes join together6 coloured fur/feathers a band of fur, feathers, or skin around an animal’s neck that is a different colour from the rest of the animal → blue-collar, dog collar, white-collar
cat/dogCAT/DOGDHP a narrow band of leather or plastic that is fastened around an animal’s neck3 injured neck an object that someone wears around their neck to support it when it has been injured4 business a way of making sure that stocks you own do not lose money, even if their price goes down5 machineMACHINETE a circular ring that goes round a pipe to make it stronger, especially where two pipes join together6 coloured fur/feathers a band of fur, feathers, or skin around an animal’s neck that is a different colour from the rest of the animal → blue-collar, dog collar, white-collarExamples from the Corpus
collar• Last week, Helen excelled herself - a black matt waterproof, lined, with a turn-back collar of fake ocelot!• Choker collars and straw-topped hats between the Wars. 4.• Under his chin the bandage was like a military collar.• He emerged in loafers, a blazer and a shirt with an open collar.• She closed her eyes and let her fingers burrow through the tissue paper until she felt the lace of the collar.• The other customers were almost as hot under the collar as Phyllis, but for very different reasons!• Tabitha Jute pulled up the collar of her old foil jacket and strode off past the concession stalls, looking for transport.• I turned up the collar of my fake biker's jacket and walked off.collar and tie• He did not like wearing suits and he liked a collar and tie even less.• He dressed differently too - he wore a collar and tie while their shirts were collarless.• She made me put on my suit and collar and tie.• For work, put on chainstore collar and tie.• I came back for my brother's funeral, and I wore my collar and tie.• Mulcahey slipped the red ribbon around the collar and tied a big bow.• Not for the stuffy - white collars and ties are irrelevant and the atmosphere could be described as flamboyantly casual.• I remembered that sometimes men are decked out in their best suits with collars and ties.collarcollar2 verb [transitive] 1 CATCHto catch someone and hold them so that they cannot escape The police collared him less than 20 minutes after the robbery.2 to find someone so that you can talk to them, especially when they would prefer to avoid you He collared her in the staff room at lunchtime and started telling her about his holiday plans.3 → high-collared/open-collared/fur-collared etc→ See Verb tableExamples from the Corpus
collar• Seventeen Florida panthers have been collared.• He collared a chilli-bean pie, a couple of samosas and an almond slice at 15p each.• Color: Light blue collars a pale neck, behind writhe thick green vines, exploding ultramarine blooms.• Hugh was quickly collared by a salesperson.• He can't face the head's study, so he collars Potter in the hall.• So I whispered to Mowat to collar the other feller.Origin collar1 (1300-1400) Old French coler, from Latin collare, from collum “neck” 