merge in

merge in

1. To join, unite, or blend in (with some larger group or body). Be sure to give another car plenty of space to join the highway when it merges in from a side road. There's a stream that merges in about 100 kilometers from here—that's where we can nab the bandits.
2. To join, unite, or blend someone or something into some larger group or body. In this usage, a noun or pronoun is used between "merge" and "in." Our plan is to merge the legal department in with HR—that way we can reduce our staff numbers and save on costs. Because of the accident, police merged everyone in from left lane.
See also: merge
Farlex Dictionary of Idioms.

merge in (to something)

to join into something. The stream merged into the main channel of the river.
See also: merge
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • merge
  • Can I join you?
  • Could I join you?
  • join
  • join forces
  • join forces (with one)
  • join issue
  • join in
  • join up
  • (Do you) care if I join you?