adjective
- unduly demonstrative; lacking reserve: effusive greetings; an effusive person.
- pouring out; overflowing.
- Geology. extrusive(def 3).
adjective
- extravagantly demonstrative of emotion; gushing
- (of rock) formed by the solidification of magma
1660s, from Latin effus-, stem of effundere (see effusion) + -ive. Related: Effusively.