margin of safety

The citizens of Stevens Point defeated fluoridation by a healthy margin.
Anti-Fluoriders Are The OG Anti-Vaxxers|Michael Schulson|July 27, 2016|DAILY BEAST
A passing off-duty school safety officer named Fred Lucas said that he had been told the man was a drug dealer.
Shot Down During the NYPD Slowdown|Michael Daly|January 7, 2015|DAILY BEAST
“This is the only place in the souk you can buy safety pins,” he said.
The Photographer Who Gave Up Manhattan for Marrakech|Liza Foreman|January 6, 2015|DAILY BEAST
The accident rate in Asia has marred what was in 2014 a banner year for aviation safety.
Annoying Airport Delays Might Prevent You From Becoming the Next AirAsia 8501|Clive Irving|January 6, 2015|DAILY BEAST

Not for the benefit of the harasser, of course, but for your own safety.
Cover-Ups and Concern Trolls: Actually, It's About Ethics in Suicide Journalism|Arthur Chu|January 3, 2015|DAILY BEAST
To Berthier, if to any one, Bonaparte entrusted his secret designs, for he knew that he could do so in safety.
Napoleon's Marshals|R. P. Dunn-Pattison
These residents then killed the parish priest, and without arms fled for safety to the mountain ravines.
The Philippine Islands|John Foreman
Juan de Messa lost his head, and ran down stairs, thinking that his safety lay there.
The Philippine Islands, 1493-1898, Volume XX, 1621-1624|Various
In short, in a few minutes, he might have the safety of his father, and the preservation of Europe in his hand.
The Pastor's Fire-side Vol. 3 of 4|Jane Porter
You never know when you are going to stumble upon a jewel in the most out-of-the-way corner.
Music-Study in Germany|Amy Fay

Medical definitions for margin of safety

margin of safety

The amount between a therapeutic dose and a lethal dose of a drug.