• Happening by turns; one following the other in succession of time or place; first one and then the other (repeatedly)
  • Designating the members in a series, which regularly intervene between the members of another series, as the odd or even numbers of the numerals; every other; every second.
  • Other; alternative.
  • Distributed singly at different heights of the stem, and at equal intervals as respects angular divergence



  • To perform by turns, or in succession; to cause to succeed by turns; to interchange regularly.
  • To happen, succeed, or act by turns; to follow reciprocally in place or time; followed by with.
  • To vary by turns.
  • To perform an alternation (removal of alternate vertices) on (a polytope or tessellation); to remove vertices (from a face or edge) as part of an alternation.


  • From Latin alternĊ, from alternus, from alter + -rnus. See altern, alter.

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