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

• (Received Pronunciation) IPA^(key): /ɪntəˈsɛkt/

• Audio (UK):

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• (General American) IPA^(key): /ɪntɚˈsɛkt/
• Rhymes: -ɛkt

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

1. (ambitransitive) 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.

   • 1782–1785, William Cowper, “(please specify the page)”, in The Task, a Poem, […], London: […] J[oseph] Johnson;  […], →OCLC:

     Lands intersected by a narrow frith / Abhor each other.

2. (mathematics) Of two sets, to have at least one element in common.

• “intersect”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “intersect”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• “intersect”, in OneLook Dictionary Search.