Third-person singular simple present indicative form of rewhiten

(historical) A bell rung to signal danger or emergency. / A bell which is rung to indicate a pre-arranged time, especially to mark a desired moment for waking up, performing a specific action etc.

A push, thrust, or sudden blow, given by the head; a head butt. / A thrust in fencing.

A specified object, thing or person (especially one nearby or known).