I. | ̷ ̷ ̷ ̷| ̷ ̷ transitive verb
Etymology: under (I) + charge
1. : to charge less than is usual or suitable for ; also : to charge (a person) too little for something
undercharge an oil company for shipments
2.
a. : to load (a gun) with too small an explosive charge
b. : to give (a storage battery) an insufficient charging
II. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
: a charge that is less than is usual or suitable ; specifically : a rate assessed a shipper or consignee that is less than the rate prescribed by the tariff