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Entry 1 sense Webster, 1913

commutativity

· com·mu·ta·tiv·i·ty · IPA
01 n. the property of a binary operation or operator such that the result of one term operating on a second is equal to the result of the second …
  1. 1.
    the property of a binary operation or operator such that the result of one term operating on a second is equal to the result of the second term operating on the first.(Math.)