break up

Verb

break up (third-person singular simple present breaks up, present participle breaking up, simple past broke up, past participle broken up)

1. (transitive) To break or separate into pieces.
   • Break up the cheese and put it in the salad.
2. (intransitive) To break or separate into pieces; to disintegrate or come apart.
   • It broke up when it hit the ground.
   • So, subject to the salvaging of serviceable parts, all five were withdrawn for breaking up in 1936-7, and thus ended one of the shortest histories of an important locomotive class on record.1949 May and June, R. A. H. Weight, “A Short-Lived Pacific Class”, in Railway Magazine, page 196
3. (transitive) To upset greatly; to cause great emotional disturbance or unhappiness in.
   • "I remember his wail at the meeting, which began: 'In fifty years experience of scientific intercourse----' It quite broke the old man up."1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC
4. (idiomatic, intransitive) To end a (usually romantic or sexual) relationship.
   • She broke up with her boyfriend last week.
5. (intransitive, reciprocal) To end a (usually romantic or sexual) relationship with each other.
   • Jane and Stephen broke up.
6. (idiomatic, intransitive) To dissolve; to part.
   • The meeting finally broke up after a three-hour discussion.
   • At length, one night, when the company by ſome accident broke up much ſooner than ordinary, ſo that the candles were not half burnt out, ſhe was not able to reſiſt the temptation, but reſolved to have them ſome way or other. Accordingly, as ſoon as the hurry was over, and the ſervants, as ſhe...1762, Charles Johnstone, The Reverie; or, A Flight to the Paradise of Fools, volume 2, Dublin: Printed by Dillon Chamberlaine, →OCLC, page 202
7. (idiomatic, intransitive) Of a school, to close for the holidays at the end of term.
   • Once the schools break up for the holidays, children across the country are at a loose end and instances of kids doing stupid things on the railway become far too common.2021 August 25, Stefanie Foster, “Comment: A dumb way to die”, in RAIL, number 938, page 3
8. (intransitive) Of a conversation, to cease to be understandable because of a bad connection; of a signal, to deteriorate.
   • You're breaking up. Can you repeat that? Well, it got cut off.
   • what did you say? you're breaking up on me2009, Lady Gaga et al., “Telephone”
9. (idiomatic, transitive) To stop a fight; to separate people who are fighting.
   • The police came in to break up the disturbance.
10. (figuratively, idiomatic, intransitive) To become disorganised.
    • England's superior conditioning began to show in the final quarter and as the game began to break up, their three-quarters began to stamp their authority on the game. And when Foden went on a mazy run from inside his own 22 and put Ashton in for a long-range try, any threat of an upset was when and...2011 September 18, Ben Dirs, “Rugby World Cup 2011: England 41-10 Georgia”, in BBC Sport
11. (transitive) To cut or take to pieces for scrap.
    • Ex-Brighton "I4" 4-4-2 tank No. 2034, the last of its class, and "02" 0-4-4 tank No. 214 have been broken up.1940 December, “Notes and News: Locomotive News”, in Railway Magazine, pages 667–668
    • It may not be known generally that the tenders of the scrapped engines of this class were found to be in too good a condition to be broken up, and are now attached to Class "J15" 0-6-0 goods.1948 November and December, Reginald H. Coe, “The Holden 2-4-0 Locomotives of the L.N.E.R.”, in Railway Magazine, page 366
12. (idiomatic, intransitive, slang, transitive) To be or cause to be overcome with laughter.