1 BE WARM slightly hot, especially pleasantly: a warm bath | I hope we get some warmer weather soon. | keep sth warm (=stop something from becoming cold): I've put your dinner in the oven to keep it warm.2 FEEL WARM feeling slightly hot, or making you feel this way: Are you warm enough? | keep warm (=wear enough clothes not to feel cold): Make sure you keep warm!3 CLOTHES/BUILDINGS clothes or buildings that are warm can keep in heat or keep out cold: Here, put on your nice warm coat.4 FRIENDLY friendly in a way that makes you feel comfortable: a warm, reassuring smile | a warm welcome: Please give a warm welcome to our special guest!5 COLOUR colours that are warm are red, yellow, orange, and similar colours6 as warm as toast pleasantly warm7 CORRECT used especially in games to say that someone is near to guessing the correct answer or finding a hidden object: You're getting warmer.—opposite cold 1 (13)8 make it/make things warm for sb informal to cause problems for someone in order to punish them9 warm scent/trail a smell or path that has been made recently, which a hunter can easily follow10 ANGRY/EXCITED AmE fairly angry or excited: The atmosphere in the meeting grew warm .—see also: keep sb's seat warm keep 1 (4) — warmness noun (U) 2 verb also warm up1 (T) to make someone or something warm or warmer: Here, warm yourself by the fire.2 (I) to be heated(+ in/by/on): There's some soup warming in the pot. warm to sb/sth phrasal verb (T)1 to begin to like something, or someone you have just met: Bruce didn't warm to him as he had to Casey.2 to become more eager or excited about something: warm to a theme/subject/topic etc: The more she spoke, the more she warmed to her subject.warm up phrasal verb1 MAKE WARM (I, T) to become warm or to make someone or something warm: warm sb/sth up A brandy should warm you up. | If you're ready for your dinner I'll warm it up.2 DO EXERCISES (I) to do gentle physical exercises to prepare your body for dancing, sport etc: The athletes are warming up before the race.3 MACHINE/ENGINE (I, T) if you warm up a machine or engine or it warms up, it becomes ready to work properly4 PARTY (I, T) if a party warms up, it starts to become enjoyable: Don't go, things are just starting to warm up.5 BECOME CHEERFUL (I, T) to become cheerful, eager, and excited, or to make someone feel this way: warm sb up: He warmed up the audience by telling them a few jokes.—see also: like death warmed up/over death (9) warm up to sth phrasal verb (T) AmE to warm to someone or something 3 noun the warm especially BrE a place that is warm: Come into the warm! 4 adverb wrap up warm to put on enough clothes so that you do not feel cold
Longman dictionary of contemporary English. 2004.