La"bor*ing, a.
1.
That labors; performing labor; esp., performing coarse, heavy work, not requiring skill also, set apart for labor; as, laboring days.
The sleep of a laboring man is sweet.
eccl. v. 12.
2.
Suffering pain or grief.
Pope.
Laboring oar, the oar which requires most strength and exertion; often used figuratively; as, to have, or pull, the laboring oar in some difficult undertaking.
© Webster 1913.