run in

Short definition from Wiktionary

Adjective

1. 1
   Alternative form of run-in (adjective) (styled open when in predicative position): (not comparable) Having been run in before or behind previous text.
2. 2
   Alternative form of run-in (adjective) (styled open when in predicative position): (sometimes comparable) Having been run in to seat the parts.
3. 3
   (not comparable) Having been run in before or behind previous text.
4. 4
   (sometimes comparable) Having been run in to seat the parts.

Noun

1. 1
   Alternative spelling of run-in (omitting the hyphens from nouns of this type is nonstandard in formal publications but widely seen in unedited writing)
2. 2
   An encounter; a scrape or brush, especially one involving trouble or difficulty.
3. 3
   The end-phase of a competition etc.

Verb

1. 1
   To arrest; (especially) to track down and arrest.
2. 2
   To use new machinery at less than full speed, preventing damage.
3. 3
   To start a new regime slowly.
4. 4
   To score (a try).
5. 5
   To insert (a word, etc.) without making a line break or new paragraph (so that it is not free-hanging).
6. 6
   To alter the position of matter to fill vacant space.
7. 7
   simple past and past participle of run in