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effusive

American  
[ih-fyoo-siv] / ɪˈfyu sɪv /

adjective

  1. unduly demonstrative; lacking reserve.

    effusive greetings; an effusive person.

  2. pouring out; overflowing.

  3. Geology. extrusive.


effusive British  
/ ɪˈfjuːsɪv /

adjective

  1. extravagantly demonstrative of emotion; gushing

  2. (of rock) formed by the solidification of magma

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Etymology

Origin of effusive

First recorded in 1655–65; effuse + -ive

Explanation

Getting a compliment from your effusive Aunt Sally can be a little embarrassing. Since she's so effusive, Aunt Sally holds nothing back, gushing with enthusiasm. The adjective effusive means "extravagantly demonstrative," and if you know someone who expresses positive emotions in a heartfelt, bubbly way, you understand just what the word means. The word effusive has a surprisingly similar definition in geology; it describes a particular kind of volcanic eruption, one in which lava bubbles up out of the volcano and flows around it.

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