n.
Pronunciation: i- ' kw ā -zh ə n also -sh ə n
Function: noun
Date: 14th century
1 a : the act or process of equating b (1) : an element affecting a process : FACTOR (2) : a complex of variable factors c : a state of being equated specifically : a state of close association or identification <bring governmental enterprises and payment for them into immediate equation ― R. G. Tugwell>
2 a : a usually formal statement of the equality or equivalence of mathematical or logical expressions b : an expression representing a chemical reaction quantitatively by means of chemical symbols