'Step-up' definitions:
Definition of 'step-up'
(from WordNet)
noun
The act of increasing something; "he gave me an increase in salary" [syn: increase, step-up] [ant: decrease, diminution, reduction, step-down]
Definition of 'Step-up'
From: GCIDE
- Step-up \Step"-up`\, a. (Elec.) Transforming or converting a low-voltage current into one of high voltage; as, a step-up transformer. [Webster 1913 Suppl.]