Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
an extra amount of something, such as time or money, that you allow because there might be a mistake in your calculations:
the amount by which a set of data might not be accurate:
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
