Sudoku meaning

so͝o-dō'ko͝o
A puzzle in which a grid consisting of several regions is to be filled with numbers so that every row, column, and region contains only one instance of each number. The most common format is a grid of nine rows and columns that are divided into nine smaller regions of three rows and three columns into which the numbers 1 through 9 must be placed.
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A puzzle typically consisting of a large grid of 81 squares (9 across and 9 down) subdivided into 9 smaller grids of 9 squares (3 across and 3 down), with each of the squares to be filled in with the numbers 1 through 9 without repeating a number in any of the large grid's rows, columns, or smaller grids.
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(games, puzzles) A type of puzzle whose completion requires each of typically nine rows and columns and each of as many usually square subregions to contain, without duplication, 1 up to 9 or the grid dimension.
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Origin of sudoku

  • Japanese sūdoku contraction of sū(ji wa) doku(shin ni kagiru) the numbers are limited to a single occurrence (the phrase under which sudokus appeared in a magazine which popularized them in Japan in the 1980s) sū(ji) number doku(shin) single
    From American Heritage Dictionary of the English Language, 5th Edition
  • Japanese 数独 (sÅ«doku), numbers singly
    From Wiktionary