What is Safety ?
Safety is (noun) 1. being safe The police tried to ensure the safety of the public. I am worried about the safety of air bags in cars. to take safety precautions or safety measures to act to make sure something is safe Be sure to take proper safety precau- tions when handling explosives. 2. for safety to make something safe, to be safe Put the money in the office safe for safety. Keep a note of the numbers of your travel- ler’s cheques for safety.
source: Easier English, Student Dictionary Upper Intermediate Level