Meaning

1. to resend, retransmit; to send again
2. to send back (to give back to the original sender)
3. to give back, throw back, post back, bounce back, swing back etc.
4. to put off, postpone (an appointment, a duty)
5. to reflect (i.e. of a reflective surface)
6. to echo (of sound, to come back)
7. to fire, dismiss, expel a student
8. to refer (somebody to something)
9. to remind (somebody of something)