See more synonyms for intersection on
  1. a place where two or more roads meet, especially when at least one is a major highway; junction.
  2. any place of intersection or the act or fact of intersecting.
  3. Mathematics.
    1. Also called meet, product.the set of elements that two or more sets have in common. Symbol: ∩
    2. the greatest lower bound of two elements in a lattice.

Origin of intersection

First recorded in 1550–60, intersection is from the Latin word intersectiōn- (stem of intersectiō). See intersect, -ion
Related formsin·ter·sec·tion·al, adjectivenon·in·ter·sec·tion·al, adjective

Synonyms for intersection

See more synonyms for on
1. crossroads, crossing, corner. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for intersection

crossing, interchange, junction, circle, stop, crossway, cloverleaf, crosswalk

Examples from the Web for intersection

Contemporary Examples of intersection

Historical Examples of intersection

  • Stephen reached the point of intersection, stood still and listened.

  • I parked in the middle of an intersection, but I didn't think they'd mind.

    Ten From Infinity

    Paul W. Fairman

  • Then bore the holes with a dowel-bit at the intersection of the lines, Fig. 263.

    Handwork in Wood

    William Noyes

  • Cars were snarled up for blocks on either side of the intersection.


    Alan Edward Nourse

  • Alan found himself at an intersection, and wondered where he was to begin.

    Starman's Quest

    Robert Silverberg

British Dictionary definitions for intersection


  1. a point at which things intersect, esp a road junction
  2. the act of intersecting or the state of being intersected
  3. maths
    1. a point or set of points common to two or more geometric configurations
    2. Also called: productthe set of elements that are common to two sets
    3. the operation that yields that set from a pair of given sets. Symbol: ∩, as in AB
Derived Formsintersectional, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for intersection

"act or fact of crossing," 1550s, from Middle French intersection (14c.) and directly from Latin intersectionem (nominative intersectio) "a cutting asunder, intersection," noun of action from past participle stem of intersecare "intersect, cut asunder," from inter- "between" (see inter-) + secare "to cut" (see section). Originally a term in geometry; meaning "crossroads" is from 1864.

Online Etymology Dictionary, © 2010 Douglas Harper

intersection in Science


  1. The point or set of points where one line, surface, or solid crosses another.
  2. The set that contains only those elements shared by two or more sets. The intersection of the sets {3,4,5,6} and {4,6,8,10} is the set {4,6}. The symbol for intersection is . Compare union.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.