Definitions for uncertainty principle
Random House Webster's College Dictionary
the quantum-mechanical principle, formulated by Heisenberg, that measuring either of two related quantities, as position and momentum or energy and time, produces uncertainty in measurement of the other.
Origin of uncertainty principle:
uncertainty principle, indeterminacy principle(noun)
(quantum theory) the theory that it is impossible to measure both energy and time (or position and momentum) completely accurately at the same time
Heisenberg uncertainty principle.
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