What does erupt mean?
To erupt is to burst forth suddenly and violently. Its most vivid sense describes volcanoes ejecting lava and ash, but the word extends naturally to any abrupt outbreak: fighting erupting between rivals, laughter erupting in a theater, or a rash erupting on the skin. Dentists even speak of teeth erupting through the gums. Derived from the Latin eruere, formed from e- (out) and rumpere (to break), erupt literally means 'to break out,' a heritage shared by words such as rupture, interrupt, disrupt, and irruption. The word carries strong connotations of force and suddenness — whatever erupts does so dramatically, not gradually — which makes it a favorite of journalists describing crises and celebrations alike. Standard in both British and American English, it works comfortably in formal reporting and everyday speech, and its figurative uses are so well established that they carry no metaphorical strain.
verbTo burst out or break forth suddenly and violently, as lava from a volcano, a crowd into disorder, or a rash onto the skin.
- (of a volcano) to burst out suddenly and violently, ejecting lava, ash, and gases
- (of violence, fighting, or unrest) to break out suddenly
- (of a person or crowd) to express an emotion suddenly and loudly, as in laughing, cheering, or shouting
- (medicine) (of a rash, spots, or lesions) to appear suddenly on the skin
- (of teeth) to emerge through the gum
"The volcano erupted without warning, sending ash high into the sky."
"Mount Etna erupted again last night, coating nearby villages in a layer of ash."
"The courtroom erupted in cheers when the verdict was read aloud."
Erupt literally means to 'break out' — from Latin rumpere, the same verb that gives us rupture — so when a volcano erupts, it is quite literally breaking itself open.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of erupt
Erupt comes from the Latin erumpere, formed from e- (out) plus rumpere (to break), so the literal sense is 'to break out.' English adopted it in the early seventeenth century, initially for violent physical breaking-forth before it settled into its modern geological sense. It belongs to a productive family of rumpere derivatives including rupture, interrupt, disrupt, corrupt, and the rarer irrupt, which preserves the opposite directional sense of bursting inward.
Related word forms
How erupt is actually used
Erupt is standard in both formal and informal registers. It is frequently used figuratively for emotions and conflict ('the crowd erupted'), which is fully established rather than a stretch. In dentistry and medicine it has precise technical senses (teeth erupting, rashes erupting). It is almost always intransitive; the passive-sounding transitive use is rare.
Easily confused with erupt
Erupt means to burst outward, while irrupt (from the same Latin root) is a rarer word meaning to burst inward, often describing animals suddenly entering an area.
Corrupt shares erupt's Latin root meaning 'to break' but refers to moral decay or data damage, not to bursting forth.