Definition of "time-independent" []

• Not time-dependent; not determined by the value of a variable representing time. (adjective)

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• "Now suppose that our Lagrangian has a time-independent symmetry (we mean a symmetry as an invariance: something does not change under a set of transformations)."
• "The waveform with a given initial condition (its form at t = 0), remains a solution of the time-independent Schrödinger equation for all later times."
• "The Schrödinger Equation, cornerstone of quantum mechanics. (technically, this is a one-dimensional, time-independent, version of the equation)."