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From Latin intersecare (to cut between, cut off), from inter (between) + secare (to cut).


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intersect (third-person singular simple present intersects, present participle intersecting, simple past and past participle intersected)

  1. (transitive, intransitive) To cut into or between; to cut or cross mutually; to divide into parts.
    Parallel lines don't intersect.
    Any two diameters of a circle intersect each other at the centre.
    • Cowper
      Lands intersected by a narrow frith / Abhor each other.
  2. (mathematics) Of two sets, to have at least one element in common.

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