blow up

phrasal verb·5 senses·particle up

Meanings

1

Explode or be destroyed by an explosion

Why “up”? Rising into view. What comes up becomes present and visible.

The car blew up in the alley.
The car exploded in the alley.
The old boiler blew up in the basement.
The old boiler exploded in the basement.
2

Inflate something by filling it with air

Why “up”? More of something is higher. Quantity, intensity and speed all rise.

Can you blow up these balloons?
Can you inflate these balloons?
She blew up the air mattress.
She inflated the air mattress.
3

Suddenly become very angry

Why “up”? Something normal is disturbed. Feelings, systems, machines, or behavior become noisy, troubled, or out of control.

He blew up at me over a small mistake.
He suddenly became furious with me over a small mistake.
The coach blew up when we arrived late.
The coach suddenly became very angry when we arrived late.
4

Enlarge a photograph or image

They blew up the photo to fit the wall.
They enlarged the photo to fit the wall.
The designer blew up the logo for the banner.
The designer enlarged the logo for the banner.
5

(of a storm or argument) develop quickly into something serious

A storm blew up out of nowhere.
A storm developed quickly out of nowhere.
A row blew up during the meeting.
An argument developed quickly during the meeting.

Don't confuse with

blow upblow out

Blow up means explode. Blow out means stop a flame by blowing.

blow upblow down

Blow up means inflate something by filling it with air. Blow down means cause something to fall by blowing.

Test yourself

The car blew up in the alley. What does it mean?

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