From Longman Dictionary of Contemporary Englisharmarm1 /ɑːm $ ɑːrm/ ●●● S1 W1 noun [countable] 1 BODYHBbody one of the two long parts of your body between your shoulders and your hands Dave has a broken arm.left/right arm He had a tattoo on his left arm. Tim’s mother put her arms around him. Pat was carrying a box under his arm. He had a pile of books in his arms. They walked along the beach arm in arm (=with their arms bent around each other’s).take somebody by the arm (=lead someone somewhere by holding their arm) She took him by the arm and pushed him out of the door.take somebody in your arms (=gently hold someone with your arms) Gerry took Fiona in his arms and kissed her.cross/fold your arms (=bend your arms so that they are resting on top of each other against your body) He folded his arms and leaned back in his chair. The old lady rushed to greet him, arms outstretched.2 → arms3 
furnitureFURNITUREDHF the part of a chair, sofa etc that you rest your arms on4 clothingCLOTHINGDCC the part of a piece of clothing that covers your arm SYN sleeve5 → be up in arms6 → with open arms7 → somebody would give their right arm to do something8 → hold something at arm’s length9 → keep/hold somebody at arm’s length10 → as long as your arm11 part of groupPART OF GROUPPART a part of a large group that is responsible for a particular type of activity the political arm of a terrorist organization Epson America is the US marketing arm of a Japanese company.12 object/machineTDOBJECT/MACHINE a long part of an object or piece of equipment the arm of a record player There is a 15-foot arm supporting the antenna. 13 → on somebody’s arm14 → arms → arms akimbo at akimbo(1), → babe in arms at babe(1), → brothers in arms at brother1(6), → cost an arm and a leg at cost2, → fold somebody in your arms at fold1(7), → twist somebody’s arm at twist1(9)COLLOCATIONSadjectivessomebody’s left/right armShe broke her left arm in a riding accident.broken/fracturedHe was taken to hospital with a broken arm.stronga muscular man with strong armsbare (=not covered by clothes)She wore no stockings and her arms were bare.verbswave your arms (=to attract attention)The man was waving his arms and shouting something.raise your armStand with your feet apart and your arms raised above your head.fold/cross your arms (=bend both arms in front of your body)He folded his arms across his chest and waited.stretch/hold out your armsI dreamt I saw my mother again with her arms stretched out towards me.grab somebody’s arm (=take hold of it with a sudden violent movement)‘Wait’, he cried, grabbing her arm.put/wrap your arms around somebodyI put my arms around Bobby and gave him a hug.take/hold somebody in your arms (=gently put your arms around someone you love)He took her in his arms and kissed her.take somebody by the arm (=lead someone somewhere holding their arm)‘It’s this way’ he said, taking me by the arm.phrasesarm in arm (=with your arm linked to someone else’s arm)There were several young couples, walking arm in arm.with arms akimbo (=with your hands on your hips so that your elbows point away from your body)Anna stood with arms akimbo, ready to challenge me.with outstretched armsManuel came forward with outstretched arms to welcome Magda.
furnitureFURNITUREDHF the part of a chair, sofa etc that you rest your arms on4 clothingCLOTHINGDCC the part of a piece of clothing that covers your arm SYN sleeve5 → be up in arms6 → with open arms7 → somebody would give their right arm to do something8 → hold something at arm’s length9 → keep/hold somebody at arm’s length10 → as long as your arm11 part of groupPART OF GROUPPART a part of a large group that is responsible for a particular type of activity the political arm of a terrorist organization Epson America is the US marketing arm of a Japanese company.12 object/machineTDOBJECT/MACHINE a long part of an object or piece of equipment the arm of a record player There is a 15-foot arm supporting the antenna. 13 → on somebody’s arm14 → arms → arms akimbo at akimbo(1), → babe in arms at babe(1), → brothers in arms at brother1(6), → cost an arm and a leg at cost2, → fold somebody in your arms at fold1(7), → twist somebody’s arm at twist1(9)COLLOCATIONSadjectivessomebody’s left/right armShe broke her left arm in a riding accident.broken/fracturedHe was taken to hospital with a broken arm.stronga muscular man with strong armsbare (=not covered by clothes)She wore no stockings and her arms were bare.verbswave your arms (=to attract attention)The man was waving his arms and shouting something.raise your armStand with your feet apart and your arms raised above your head.fold/cross your arms (=bend both arms in front of your body)He folded his arms across his chest and waited.stretch/hold out your armsI dreamt I saw my mother again with her arms stretched out towards me.grab somebody’s arm (=take hold of it with a sudden violent movement)‘Wait’, he cried, grabbing her arm.put/wrap your arms around somebodyI put my arms around Bobby and gave him a hug.take/hold somebody in your arms (=gently put your arms around someone you love)He took her in his arms and kissed her.take somebody by the arm (=lead someone somewhere holding their arm)‘It’s this way’ he said, taking me by the arm.phrasesarm in arm (=with your arm linked to someone else’s arm)There were several young couples, walking arm in arm.with arms akimbo (=with your hands on your hips so that your elbows point away from your body)Anna stood with arms akimbo, ready to challenge me.with outstretched armsManuel came forward with outstretched arms to welcome Magda. Examples from the Corpus
arm• Dana has a broken arm.• Jens' mother put her arms around him.• Thwarted, he then embraced her stiffly before taking the baby in his arms under the watchful eye of his wife.• Pat was carrying a large box under his arm.• The lateral arm plates also carry a series of long bristle-like spines, dorsal to the arm spines.• Epson America is the United States marketing arm of a Japanese company.• He tore past the carousels, raced around columns and flew back into my arms.• The declaration exposed him to accusations of hypocrisy after each revelation of arms sales to dubious regimes.• Later yet we are herded down to the basement, told to crouch and to cover our heads with our arms.• There are 5 short arm spines, the longest is scarcely equal in length to one segment.• He died in the arms of a passing motorist.• Soon she would lie down in the arms of a stronger lover than Tom would ever be and fall asleep.arms outstretched• Encased in plaster, legs down, arms outstretched as if crucified, patients lay in convalescent hospitals.• Singer put both hands up before his face, arms outstretched; he was begging.• I tossed the bottle up to them and jumped high as I could, my arms outstretched over my head.• The pipe was just high enough so that I could swing with my arms outstretched and not drag my bottom.• We had to edge sideways along with our arms outstretched against the opposite wall for support.• Postural tremor-present primarily on static posturing, i. e., with the arms outstretched but not moving. 3.• Start as before with arms outstretched, then gently curve the body sideways.armarm2 verb [transitive] 1 WEAPONto provide weapons for yourself, an army, a country etc in order to prepare for a fight or a wararm somebody with something The local farmers have armed themselves with rifles and pistols. The rebels armed a group of 2,000 men to attack the city. → armed, unarmed2 INFORMATIONto provide all the information, skills, or equipment you need to do something SYN equiparm somebody with something Arm yourself with all the facts you need to argue your case. The guidebook arms the reader with a mass of useful information.→ See Verb tableExamples from the Corpus
arm• Roman candles, squibs and rockets were already in the shops and the protesters had armed themselves.arm somebody with something• Arm yourself with all the facts you'll need to show you qualify for a loan.• The local farmers have armed themselves with rifles and pistols.From Longman Business DictionaryARMARM BANKINGabbreviation for ADJUSTABLE RATE MORTGAGE → see under mortgage1Origin arm1 1. Old English earm2. (1100-1200) Old French armes (plural), from Latin arma arm2 (1200-1300) Old French armer, from Latin armare, from arma; → ARM1 