Definition

Verb

  1. To slack or backhaul a line or tackle.
  2. To repair.
  3. To overtake a vessel.

Origin

(First definition) 16th century. (Second definition) Probably earlier than the 18th century. (Third definition) Probably earlier than the 17th century. The origin of these definitions is vague.

Comments

It depends on the context you’re using it in, but to overhaul can mean any of those three definitions. Warships usually go into drydock for an overhaul every few years to repair, inspect, or outfit the vessel.

References

Kemp, P. (1994). The Oxford Companion to Ships and the Sea. Oxford University Press.

Rogers, J.G. (1985). Origins of Sea Terms. Mystic Seaport.