(transitive with to) To defy or oppose something, especially an expectation, custom, or social standard.

(idiomatic) To behave recklessly. / (idiomatic) To take a calculated risk. / Used other than figuratively or idiomatically: see run, scissors.

plural of run-on sentence

A classroom exercise in which students run to a text, and then pass the message verbally to a partner.

plural of mole run

plural of running dictation

plural of run chase

(computing) a set of procedures prepared by an administrator for the day-to-day maintenance and exception handling of an IT system

Text (such as a title) printed at the top of every (or every other) page of a book, newspaper, etc.

(idiomatic, sports, games) A passage of play; a series of consecutive moments, considered as a whole.