top up

verb

1. to raise the level of (a liquid, powder, etc) in (a container), usually bringing it to the brim of the container

   top up the sugar in those bowls

2. 1. to increase the benefits from (an insurance scheme), esp to increase a pension when a salary rise enables higher premiums to be paid

   2. to add money to (a loan, bank account, etc) in order to keep it at a constant or acceptable level

noun

1. 1. an amount added to something in order to raise it to or maintain it at a desired level

   2. ( as modifier )

      a top-up loan

      a top-up policy