Try Our Apps


Avoid these words. Seriously.


[in-ter-sek-shuh n] /ˌɪn tərˈsɛk ʃən/
a place where two or more roads meet, especially when at least one is a major highway; junction.
any place of intersection or the act or fact of intersecting.
  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 forms
intersectional, adjective
nonintersectional, adjective
1. crossroads, crossing, corner. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for intersection
Contemporary Examples
Historical Examples
  • Stephen reached the point of intersection, stood still and listened.

    A Pair of Blue Eyes Thomas Hardy
  • 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.

    PRoblem 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


/ˌɪntəˈsɛkʃən; ˈɪntəˌsɛk-/
a point at which things intersect, esp a road junction
the act of intersecting or the state of being intersected
  1. a point or set of points common to two or more geometric configurations
  2. Also called product. the 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 Forms
intersectional, 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
Cite This Source
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
Cite This Source
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for intersection

Word Value for intersection

Scrabble Words With Friends