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

(informal, figuratively) (transitive with à) to return the favour

(informal, chiefly reciprocal) to pass the buck

(transitive) to postpone indefinitely