blow up

verb

1. to explode or cause to explode

2. (tr) to increase the importance of (something)

   they blew the whole affair up

3. (intr) to come into consideration

   we lived well enough before this thing blew up

4. (intr) to come into existence with sudden force

   a storm had blown up

5. informal,  to lose one's temper (with a person)

6. informal,  (tr) to reprimand (someone)

7. informal,  (tr) to enlarge the size or detail of (a photograph)

noun

1. an explosion

2. informal,  an enlarged photograph or part of a photograph

3. informal,  a fit of temper or argument

4. Also called: blowing up. informal,  a reprimand

Idioms and Phrases

Explode or cause to explode. For example, The squadron was told to blow up the bridge , or Jim was afraid his experiment would blow up the lab . The term is sometimes amplified, as in blow up in one's face . [Late 1500s]

Lose one's temper, as in I'm sorry I blew up at you . Mark Twain used this metaphor for an actual explosion in one of his letters (1871): “Redpath tells me to blow up. Here goes!” [ Colloquial ; second half of 1800s]

Inflate, fill with air, as in If you don't blow up those tires you're sure to have a flat . [Early 1400s]

Enlarge, especially a photograph, as in If we blow up this picture, you'll be able to make out the expressions on their faces . [c. 1930]

Exaggerate the importance of something or someone, as in Tom has a tendency to blow up his own role in the affair . This term applies the “inflate” of def. 3 to importance. It was used in this sense in England from the early 1500s to the 1700s, but then became obsolete there although it remains current in America.

Collapse, fail, as in Graduate-student marriages often blow up soon after the couple earn their degrees . [ Slang ; mid-1800s]

Example Sentences

Nine people have been killed and 32 injured after a stockpile of confiscated explosives accidentally blew up at a police station in Indian-administered Kashmir, police said.

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For a start, he sends lightning to blow up the plane they’re scheduled to fly home on.

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“This rotation is all about, ‘Get me through to the end of the year so I don’t blow up on valuation,’” Savage said.

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The Islamic State group blew up several temples and other structures at Palmyra, claiming that they were idolatrous.

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“It’s going to blow up before I can get this trade on,” he wrote in an e-mail.

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Related Words

• blast 
• bomb 
• burst 
• detonate 
• dynamite 
• erupt 
• go off 
• rupture 
• shatter