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Related to split up: split off
split someone or something up (into something)
to divide people or things up into something, such as groups. I had to split the group up into two sections—there were so many who showed up. I split up the class into two discussion sections.
split up (with someone)
[for someone] to separate from someone; to break up a marriage or love affair. Jeff split up with Judy. I had heard that they had split up with each other.
1. To separate someone or something, such as people or groups; disunite someone or something: Artistic differences split up the band. They've been together too long to let a little argument split them up.
2. To become divided or part company as a result of discord or disagreement: My parents split up after 20 years of marriage.
3. To divide something, as for convenience or proper ordering: They split up the remainder of the money among themselves and parted ways. We split the project up into stages.
4. To become divided or be divisible: Let's split up into teams. This poem doesn't split up into stanzas very well.
1. in. to separate. The two split up and went their separate ways.
2. n. an act of separating or breaking up. (Usually split-up.) Everyone was mentally prepared for the company’s split-up.