Sudoku Definition

so͝o-dōko͝o
noun
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.
Webster's New World

Other Word Forms of Sudoku

Noun

Singular:
sudoku
Plural:
sudokus

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 (sūdoku), numbers singly

    From Wiktionary

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sudoku