top up

/tɑp ʌp/
noun
  1. An addition or extra amount that brings something up to the desired level, especially money or a drink.
    • I need a top-up for my phone plan this month.
    • She asked the waiter for a top-up of her coffee.
    • The government announced a top-up to the student grant.
verb
  1. To add something to bring it up to the required or desired level.
    • Can you top up my glass with more lemonade?
    • I need to top up my travel card before the trip.
    • He topped up the car's oil before the long drive.
Antonyms
What does "top up" mean? | whatsthatwordmean | whatsthatwordmean