What does blowup mean?
Blowup is a versatile noun covering three related senses: a sudden explosion or bursting, an enlarged reproduction of a photograph or image, and a violent outburst of temper or a heated argument. The photographic sense—requesting a blowup of a snapshot to hang on the wall—is common in design, journalism, and law enforcement, where enlarging images can reveal crucial detail. The interpersonal sense describes those explosive moments when tempers flare and a conversation erupts into shouting. The word derives straightforwardly from the verb "blow up," meaning to explode or enlarge, and carries an inherently dramatic connotation: whatever undergoes a blowup does so suddenly, forcefully, and often destructively. Informal in tone, it appears frequently in journalism, everyday speech, and workplace descriptions of conflict. Whether describing fireworks gone wrong, a poster scaled to full size, or a relationship reaching its breaking point, blowup captures the idea of something small becoming suddenly, unmistakably large—or loud.
nounAn act or result of something blowing up, such as an explosion, or an enlarged reproduction of an image, photograph, or document. It can also mean a sudden, violent outburst of anger or a heated quarrel.
- A sudden explosion or destructive bursting, literal or figurative
- An enlarged reproduction of a photograph, image, or document
- A sudden, intense outburst of temper or a heated argument between people
"The designer pinned a full-size blowup of the poster to the wall to check every detail."
"The gas leak caused a massive blowup that shattered windows across the street."
"They had a huge blowup in the meeting, shouting over each other until the manager intervened."
Standard regular plural; occasionally styled "blow-ups" in older texts.
"The evidence room contained several blowups of the crime-scene photographs."
One word, three very different disasters: a bomb going off, a photo blown up to billboard size, and a friendship blowing up in your face.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of blowup
Blowup is formed directly from the phrasal verb "blow up," which itself comes from the Old English verb blāwan, meaning to blow or inflate, sharing a Germanic root with words like blast and bluster. The compound noun arose in English by straightforward conversion, following the pattern of other verb-plus-particle nouns such as breakdown and makeup. Its sense of explosion developed naturally from the verb's core meaning, while the photographic enlargement sense emerged in the twentieth century as photography became widespread. Spelling has varied between "blow-up" and "blowup," with the unhyphenated form now standard in American usage.
Related word forms
How blowup is actually used
Informal to neutral register. In American English especially common for photographic enlargements and for emotional confrontations; British usage favors it mainly for explosions. Often written hyphenated ("blow-up") in older or more conservative texts, though the solid form is now standard.
Easily confused with blowup
"Blow out" means to extinguish or burst by force of air or pressure, while "blowup" refers to an explosion, an enlargement of an image, or an angry outburst.
A "blowhard" is a person who boastfully talks at length, whereas a "blowup" is an event—an explosion, enlargement, or angry confrontation.