What is the meaning of Run_in?

Alternative form of run-in (adj)

  1. Having been run in before or behind previous text.

    Having been run in before or behind previous text.

    Having been run in to seat the parts.

    Alternative spelling of run-in

    To arrest; to track down and arrest.

    To use new machinery at less than full speed, preventing damage.

    To start a new regime slowly.

    To score (a try).

    To insert (a word, etc.) without making a line break or new paragraph (so that it is not free-hanging).

    To alter the position of matter to fill vacant space.

    simple past and past participle of run in

    Source: wiktionary.org