IN MATH: 1. n. the function, or rule which produces the "greatest integer less than or equal to the number" operated upon, symbol [x] or sometimes [[x]].
The greatest integer function is a piecewise defined function.
Examples: number  the greatest integer less than or equal to the number x  [x] 4  [4] = 4 4.4  [4.4] = 4 2  [2] = 2 2.3  [2.3] = 3

IN ENGLISH: 1. as defined above.
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