1. General: Allowable departure from a specification or standard, considered non-harmful to the functioning of a part, process, or product over its life cycle. 
2. Engineering: ability of an item or system to withstand high levels of stress or overloading without sufferingirreparable harm. See also safety factor. 
3. Environmental: Permissible residue level for a pesticide in raw ... Read more

USAGE EXAMPLE

One of the most important principles a child can learn is tolerance, since this helps them be understanding, kind and considerate towards people who are different than them.