v.1. To give a signal to someone at a specified time, especially a signal to begin: The conductor cued in each section of the choir one by one. Cue me in when it's time to say my lines.
2. To give information or instructions to someone, such as a latecomer: I cued in my coworker about the items that we discussed at the beginning of the meeting. She cued me in to what happened in the first five minutes of the movie.