The fact of an office or post becoming or being vacant; the time during which the vacancy lasts. Obsolete.

The fact of becoming vacant; the vacation of an office. Obsolete.

Used as n.: The vacancy of a see or seat.

The fact or condition of an office or post being, becoming, or falling vacant; an occasion or occurrence of this.

The becoming void or vacant, vacancy (of an office or benefice); also elliptical the right to fill up the vacancy.