Collins Concise English Dictionary © HarperCollins Publishers::
top up vb (transitive, adverb) Brit - to raise the level of (a liquid, powder, etc) in (a container), usually bringing it to the brim of the container
- to increase the benefits from (an insurance scheme), esp to increase a pension when a salary rise enables higher premiums to be paid
- to add money to (a loan, bank account, etc) in order to keep it at a constant or acceptable level
n top-up - an amount added to something in order to raise it to or maintain it at a desired level
- (as modifier): a top-up loan, a top-up policy
- Brit an amount added to the level of a drink, usually bringing it to the brim of the container
'top up' also found in these entries (note: many are not synonyms or translations):