Meaning of top sth up In English

• 0 to add liquid in order to fill to the top a container that is already partly full:

  • Would you like me to top up your drink?

  • Mix together some lemon juice and sugar, then top it up with water.

• 1 to add more of something, especially money, to an existing amount to create the total you need:

  • Students were able to take out loans to top up their grants.

  • This is the easiest way to top up your mobile phone.

  • top-up payments

• 2 to make something bigger by adding to it:

  • Although their life cover helps, she suggests topping it up to give extra protection.

  • top sth up with sth He pays 3% of his earnings to the retirement fund and the employer tops this up with another 2%.