| n. | 1. | The act of breaking out or bursting forth; |
| 2. | That which bursts forth. | |
| 3. | A violent exclamation; ejaculation. | |
| 4. | (Med.) The breaking out of pimples, or an efflorescence, as in measles, scarlatina, etc. |
| Noun | 1. | eruption - the sudden occurrence of a violent discharge of steam and volcanic material Synonyms: volcanic eruption |
| 2. | eruption - symptom consisting of a breaking out and becoming visible | |
| 3. | eruption - (of volcanos) pouring out fumes or lava (or a deposit so formed) Synonyms: eructation, extravasation | |
| 4. | eruption - a sudden violent spontaneous occurrence (usually of some undesirable condition); "the outbreak of hostilities" | |
| 5. | eruption - a sudden very loud noise | |
| 6. | eruption - the emergence of a tooth as it breaks through the gum |
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