An effusion is an explosion of something, usually words, ideas, or emotions. A popular singer might inspire an effusion of cheers from her devoted fans.

Mozart is known for the effusion of notes he could produce at a moment's notice — and all without erasing. A heated argument can produce an effusion of words from both sides. The volcano's eruption was an effusion of smoke and fire. The verb form of the word is effuse: After the high-school musical, your mother effused about your singing. Her comments were an effusion of praise. Your father, on the other hand, was less effusive — but he did like the dancing.

Definitions of effusion

n an unrestrained expression of emotion

blowup, ebullition, gush, outburst
show 4 types...
hide 4 types...
acting out
a (usually irritating) impulsive and uncontrollable outburst by a problem child or a neurotic adult
a fit of weeping
a sudden outburst
a sudden outburst of emotion
Type of:
expression, manifestation, reflection, reflexion
expression without words

n flow under pressure

Type of:
flood, outpouring, overflow
a large flow

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.