Definition of fill up in English:

fill up

1Become completely full: the dining car filled up
1.1Fill the fuel tank of a car.
More example sentences
  • What happens if you drive the car out of state and fill up with high-sulfur fuel?
  • The AA advises customers to shop around for fuel and to avoid filling up at motorway service stations.
  • Just recently a relative of mine was relieved of her handbag while getting into her car after filling up at a local petrol station.
See parent entry: fill

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Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something