X's and O's

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Derived from the use of the letters X and O as common stand-ins for other concepts.


X's and O's pl ‎(plural only)

  1. tic-tac-toe
  2. (idiomatic, sports) The fundamental elements of a play.
    • 2006, Jerry Krause and Ralph Pim, Basketball Beyond the X's And O's: Lessons from the Legends
  3. (idiomatic, management) The basic delineation of roles in a project.

Abbreviation [please replace this header][edit]

X's and O's

  1. kisses and hugs.
    The college co-ed signed her letter to her mother with X's and O's.