Of things: To undergo change or alteration; to pass from one condition, state, etc., to another, esp. with frequent or ready change or difference…

intransitive or absol. To produce diversity or variety.

Of things (or a person as an unconscious agent): To change, vary, fluctuate.

to ring (the) changes. transitive. To go through numerous variations of a process; to repeat essentially the same word, statement, etc., in various…

figurative. (Now chiefly without allusion to the literal sense.) Of things, conditions, etc.: To vary irregularly, undergo alternating changes in…

intransitive. To turn or change direction like a windmill obsolete. nonce-word.

intransitive. To vary within certain limits; to form a varying set or series. With between, from, to, etc.

figurative. To move or oscillate between (or betwixt) two extreme conditions, opinions, etc.; to fluctuate or vary from one extreme to another…

To fluctuate; to produce varying results.

intransitive. Of a quantity or property: to vary according to a defined rule or principle.