The setting, on a portable electronic device, that causes it to vibrate rather than sound any (or most) needed alarms.

(intransitive) To shake with small, rapid movements to and fro.

(intransitive) To resonate.

(transitive) To brandish; to swing to and fro.

(transitive) To mark or measure by moving to and fro.

(transitive) To affect with vibratory motion; to set in vibration.

(intransitive, music) To use vibrato.

(transitive, slang) To pleasure someone using a vibrator.