(intransitive but with prepositional object, literally) To enter by running. / (intransitive but with prepositional object) To collide with.

(participial adjective; editing, typography) (not comparable) Having been run in before or behind previous text.

Alternative spelling of run-in (omitting the hyphens from nouns of this type is nonstandard in formal publications but widely seen in unedited writing)

(transitive, informal, chiefly passive) To arrest; (especially) to track down and arrest. / (transitive, Britain) To use new machinery at less than full speed, preventing damage.

(idiomatic) To continue without interruption / Using a certain time zone. / (idiomatic) To continue talking for a long time. / To operate with a particular energy source.

present participle of run by

Third-person singular simple present indicative form of run by

(ditransitive) To inform briefly of the main points of; to bring an idea or proposal to the attention of (especially in order to obtain their opinion of it).

(informal) To escape from danger by running; to flee.

(idiomatic) To reach a particular maximum amount, size, value, etc. / (idiomatic) To be capable of reaching or achieving.