pick up on

1.
USUKGeneralneutral
- To notice, perceive, or become aware of a cue, hint, or subtle signal.
2.
USUKGeneralneutral
- To detect or receive a signal or transmission (for example, on radio, radar, or other equipment).
3.
USUKGeneralneutral
- To acquire, gather, or accumulate something while moving or as part of a process (people, information, items).
4.
USUKGeneralneutralinformal
- To respond to or take up a topic, theme, or action; to continue or resume something that has been initiated.
5.
USUKGeneralinformal
- To initiate romantic or sexual interest in someone; to attempt to attract or pick up a potential partner.

Examples: