/ ɪˈfjuːʒn; NAmE / noun [ C , U ]
1.
( technical ) something, especially a liquid, that flows out of sb/sth; the act of flowing out
2.
( formal ) the expression of feelings in an exaggerated way; feelings that are expressed in this way
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WORD ORIGIN
late Middle English : from Latin effusio(n-) , from effundere pour out, from ex- out + fundere pour.