line of retirement

line of retirement

[′līn əv ri′tīr·mənt]
(navigation)
The position of a scouting line when it has reached its outer limit, and a search to the rear is initiated.
References in periodicals archive ?
3 inquiries were in progress against former Deputy DG Mehboob ur Rehman but these have gone ineffective as he has crossed the line of retirement.
World Snooker chairman Barry Hearn has vowed not to stand in the 37-year-old's way should the latest in a long line of retirement warnings be one he sticks to.