1 B2 informal
To increase the volume of sound to a very high level suddenly.
"He blasted the radio up as soon as his favourite song came on."
separable
blast up
C1 informal separable transitive/intransitive
To increase volume dramatically; or to rise or move rapidly upward with great force.
In plain English
To suddenly make something much louder, OR to shoot up very fast.
What does "blast up" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 C1 neutral
To rise or move upward suddenly and with great force.
"Flames blasted up through the vent when the engineers opened the pressure valve."
inseparable
Literal vs figurative
Words literally mean
To blast (explode or project) in an upward direction.
Actually means
To suddenly make something much louder, OR to shoot up very fast.
Usage tip
Not well-established as a fixed phrasal verb; largely informal and context-dependent. 'Blast the volume up' is heard in casual speech, but 'turn up' is far more standard. The sense of something shooting upward explosively is marginal and would typically be replaced by 'blast off' or 'shoot up.' Learners should treat this as rare.
Words that pair with "blast up"
Natural word combinations native speakers use most often.
volume music speakers rocket price
How to conjugate "blast up"
The five tense forms you'll use most often.
Base
blast up
I/you/we/they
3rd person
blasts up
he/she/it
Past simple
blasted up
yesterday
Past participle
blasted up
have + pp
-ing form
blasting up
continuous
Hear "blast up" in the wild
Listen to native speakers using "blast up" in real YouTube videos — click a clip to watch it on Looplines.
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