top-up cardˈtop-up ˌcard noun [countable] 
a card that you buy in order to be able to continue using a pay-as-you-go mobile phone
a card that you buy in order to be able to continue using a pay-as-you-go mobile phone- world-beater
- world-beating
- world-class
- WorldCom
- World Council of Churches
- World Cup
- World English
- world-famous
- World Health Organization
- worldliness
- worldly
- worldly-wise
- world music
- world power
- world record
- world-record
- World Series
- World Service
- World Trade Center
- World Trade Organization
- world view
- world war
- World War I
- World War II
- world-weariness