| Underload | v. t. to load (a truck, etc.) with less than its full capacity; -- in certain circumstances, an inefficient use of resources. [ PJC ] |
| Underload starter | . (Elec.) A motor starter provided with an underload switch. [ Webster 1913 Suppl. ] |
| Underload switch | . (Elec.) A switch which opens a circuit when the current falls below a certain predetermined value, used to protect certain types of motors from running at excessive speed upon decrease of load. [ Webster 1913 Suppl. ] |