1) an upright length of wood or metal supporting or marking something; a job; a place where a soldier is (to be) on duty; a system of collecting, sorting and delivering letters, parcels etc (post)

2) a piece of printed paper put on envelopes, parcels etc to show the postage paid (stamp)

3) (a length of) a narrow strip of material used for tying up parcels etc or in dressmaking; to fasten, tie, something together with tape (tape)