1. [ noun ] the sudden occurrence of a violent discharge of steam and volcanic material
Synonyms: volcanic_eruption
Related terms: discharge plinian_eruption erupt
2. [ noun ] a sudden very loud noise
Synonyms: bang clap blast loud_noise blowup
Related terms: noise water_hammer blast bang
3. [ noun ] (of volcanos) pouring out fumes or lava (or a deposit so formed)
Synonyms: extravasation eructation
Related terms: action vent erupt spew
4. [ noun ] (medicine) any red eruption of the skin
Synonyms: efflorescence skin_eruption skin_rash roseola rash
Related terms: symptom urtication prickly_heat
5. [ noun ] (medicine) symptom consisting of a breaking out and becoming visible
Related terms: symptom exanthem enanthem eczema_vaccinatum rash
6. [ noun ] a sudden violent spontaneous occurrence (usually of some undesirable condition)
Synonyms: outbreak irruption

"the outbreak of hostilities"

Related terms: happening epidemic recrudescence erupt
7. [ noun ] the emergence of a tooth as it breaks through the gum
Related terms: emergence erupt
Similar spelling:   erupt