persistence

The act of persisting.

The state or quality of being persistent; persistency.

Continuance of an effect after the cause is removed.

In electricity, the time-constant of a circuit in which current is beginning to flow; the time required for an electric current to rise to or .634 of its final value.

The quality of being persistent; steady or firm adherence to or continuance in state, course of action, or pursuit that has been entered upon; especially (of persons), a more or less obstinate perserverance; perserverance notwithstanding opposition, warning, remonstrane, etc.