a seething or overflowing, as of passion or feeling; outburst.
2.
the state of being ebullient.
3.
the act or process of boiling up.
4.
a rushing forth of water, lava, etc., in a state of agitation.
Origin: 1525–35; < Latin ēbullītiōn- (stem of ēbullītiō), equivalent to ēbullīt(us) (past participle of ēbullīre to boil up ēbullī- (see ebullient) + -tus past participle suffix) + -iōn--ion