An encounter; a scrape or brush, especially one involving trouble or difficulty. / The end-phase of a competition.

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

Used other than figuratively or idiomatically: see on, run. / (idiomatic) Fleeing. / (idiomatic) At a disadvantage; forced to abandon a position.

Continuing on where a rhetorical pause would be more appropriate. / Placed or coming at the end of something, such as at the end of a dictionary entry.

(soccer, rugby, etc.) An amount of time spent playing on the field during a game, especially so as to evaluate a player's abilities. / A run-on sentence.

(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.