To set oneself apart or become separate from a person or thing; (of two or more people or things) to… intransitive. Now chiefly Scottish.

Of an assembly or collective body: To break up into its individual constituents; to disperse; to lose its aggregate or corporate character.

absol. and intransitive < 4 spec. of a school.

To break up as a body of soldiers, to cease to be a band or company; to break rank, fall into disorder, disperse; to leave military service.

intransitive. To separate, disperse: = disassemble, v.

intransitive (for reflexive). To disperse from ordered assembly; to break ranks by word of command.

Of two or more persons: To quit each other's society or company; (of a company) to break up.

intransitive. Of a meeting: To end, break up. U.S.