top-up

1 of 1noun

/ˈtɑpˌʌp/

Forms:top-ups

an extra amount of money added to an existing sum so that it reaches the required total

Before embarking on the road trip, I stopped at the gas station to top up the tank.
After using my public transportation card for the week, I needed to top it up with more credit to continue commuting.
To ensure a stable internet connection throughout the day, I regularly top up my data plan on my mobile phone.
The parent added funds to their child's lunch account at school to top up their balance and ensure they could purchase meals for the month.
As my prepaid phone plan was running low on minutes, I went online to top up my account before it expired.