Definitions
1.verbTo toil, to work.
2.verbTo belabour, to emphasise or expand upon (a point in a debate, etc)."I think we've all got the idea. There's no need to labour the point."
3.verbTo be oppressed with difficulties or disease; to do one's work under conditions which make it especially hard or wearisome; to move slowly, as against opposition, or under a burden.
4.verbTo suffer the pangs of childbirth.
5.verbTo pitch or roll heavily, as a ship in a turbulent sea.
6.nounThe act of one who labours; toil; work done.