(nautical) To become entangled in; to run aground on. / (idiomatic) To contravene.

(American football) An offensive back whose primary job is to be the ballcarrier.

present participle of run back

(often attributively or figuratively) An unsophisticated method of committing robbery by grabbing someone's property and attempting to flee with it.

plural of run time

(Britain) Trainers with sharp spikes in the soles. / (Canada, US, Australia) Sneakers, not cleats; tennis shoes; normal gym shoes.

(transitive, idiomatic) To summarise briefly. / (idiomatic, colloquial) To inform or educate someone, typically of a new concept or a concept particular to an organization or industry

Used other than figuratively or idiomatically: see run, around. / (idiomatic, intransitive) To be very busy doing many different things. / (idiomatic, intransitive) To go from place to place.

plural of trial run

(idiomatic, transitive) To spend a lot of time with a person or group of people. Often implies disapproval on the part of the speaker.