The condition of having too little work to do. The employees complained about underwork, as they often found themselves with nothing to do for hours.
Work that is not done thoroughly or is incomplete. The project was delayed due to underwork, as several tasks were left unfinished.
The part of a structure, mechanism, or garment that is hidden beneath the visible surface; the supporting or underlying work. The engineer inspected the bridge's underwork for signs of corrosion.