1》 collect something that has been left elsewhere.
2》 obtain, acquire, or learn something.
↘catch an illness or infection.
3》 detect or receive a signal or sound.
4》 resume something.
5》 (also pick up on ) refer to or develop a point or topic mentioned earlier.
↘become aware of or sensitive to something.
6》 N. Amer. tidy a room or building.
→ pick