1. (verb)disperse, dissipate, dispel, break up, scatter to cause to separate and go in different directions "She waved her hand and scattered the crowds"
2. (verb)separate, part, split up, split, break, break up discontinue an association or relation; go different ways "The business partners broke over a tax question"; "The couple separated after 25 years of marriage"; "My friend and I split up"
8. (verb)disassemble, dismantle, take apart, break up, break apart take apart into its constituent pieces
9. (verb)break, break up destroy the completeness of a set of related items "The book dealer would not break the set"
10. (verb)sever, break up set or keep apart "sever a relationship"
11. (verb)pick, break up attack with or as if with a pickaxe of ice or rocky ground, for example "Pick open the ice"
12. (verb)calve, break up release ice "The icebergs and glaciers calve"
13. (verb)adjourn, recess, break up close at the end of a session "The court adjourned"
14. (verb)dissolve, break up bring the association of to an end or cause to break up "The decree officially dissolved the marriage"; "the judge dissolved the tobacco company"
15. (verb)dissolve, break up come to an end "Their marriage dissolved"; "The tobacco monopoly broke up"
16. (verb)break up, fragment, fragmentize, fragmentise break or cause to break into pieces "The plate fragmented"
17. (verb)break up, disperse, scatter cause to separate "break up kidney stones"; "disperse particles"
18. (verb)decompose, break up, break down separate (substances) into constituent elements or parts
Sense: to divide, separate or break into pieces He broke up the old furniture and burnt it; John and Mary broke up (= separated from each other) last week.