gas up
A2 informal separable both
In simple words
To fill your car with petrol before a trip.
Literal meaning: To put gas (fuel) up into the tank.
Meanings
1 A2 informal
To fill a vehicle's fuel tank with gasoline before driving.
"We need to gas up before we get on the motorway — the tank is almost empty."
Grammar: separable
2 A2 informal
To supply a vehicle or piece of equipment with fuel in preparation for use.
"The ground crew gassed up the planes overnight so they would be ready at dawn."
Grammar: separable
Usage notes
Primarily North American English. British speakers typically say 'fill up' or 'get petrol'. Used both transitively ('gas up the car') and intransitively ('we gassed up before the highway'). Common in everyday spoken American English.
Commonly used with
car truck vehicle tank highway station
Forms
Base
gas up
I/you/we/they
3rd person
gases up
he/she/it
Past simple
gased up
yesterday
Past participle
gased up
have + pp
-ing form
gasing up
continuous
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Synonyms
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