Tolerance
Tolerance, in a cultural and religious sense, is the acceptance that other people hold beliefs that you don't agree with, act in ways you don't like, or just exist, and that they have every right to do so. Tolerance is long and hard sought, but rarely found. See heresy, inquisition, prejudice.
See also religious pluralism, freedom of religion, fat acceptance movement.
In engineering, tolerance is an allowance made for imperfections in a manufactured object. For example, an electrical specification might call for a resistor with a nominal value of 100 ohms, but should also state a tolerance such as "+/- 1%". This means that any resistor with a value in the range 99 ohms to 101 ohms is acceptable. It would not be reasonable to specify a resistor with a value of exactly 100 ohms, because such a resistor cannot be made. It is good practice to specify the largest possible tolerance, to make manufacturing easier and to keep costs down.