To decoct or prepare for food in hot liquid; to boil; as, to seethe flesh.
- To churn and foam as if boiling.
- To be in a state of turmoil or ferment: The nation seethed with suppressed revolutionary activity.
- To be violently excited or agitated: I seethed with anger over the insult. See Synonyms at boil1.
- Archaic To come to a boil.