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principle of operation definition, principle of operation meaning | English dictionary. principle. n (Psychoanal) the idea that psychological processes and actions are governed by the gratification of needs. n the. the principle that energy and time or position and momentum, cannot both be accurately measured simultaneously.
Definition of Function. Function is a relation in which each element of the domain is paired with exactly one element of the range. 1  A function is a relationship between two quantities in which one quantity depends on the other.  A function is a many-to-one (or sometimes one-to-one) relation.