# intersection

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Related to intersection: Intersection syndrome

## intersection

*Maths*

**a.**a point or set of points common to two or more geometric configurations

**b.**the set of elements that are common to two sets

**c.**the operation that yields that set from a pair of given sets. Symbol: ∩, as in

*A*∩

*B*

## intersection

[‚in·tər′sek·shən] (civil engineering)

A point of junction or crossing of two or more roadways.

A surveying method in which a plane table is used alternately at each end of a measured baseline.

(mathematics)

The point, or set of points, that is common to two or more geometric configurations.

For two sets, the set consisting of all elements common to both of the sets. Also known as meet.

For two fuzzy sets

*A*and*B*, the fuzzy set whose membership function has a value at any element*x*that is the minimum of the values of the membership functions of*A*and*B*at*x*.The intersection of two Boolean matrices

*A*and*B*, with the same number of rows and columns, is the Boolean matrix whose element*c*_{ij }in row*i*and column*j*is the intersection of corresponding elements*a*_{ij }in*A*and*b*_{ij }in*B*.## intersection

**i**. A point where the centerlines of runways cross each other. See

*intersecting runways*.

**ii**. A point defined by any combination of courses, radials, or bearings of two or more navigational aids.

**iii**. The point on the earth vertically above which the centerlines of airways cross.

**iv**. Used to describe the point where two runways, a runway and a taxiway, or two taxiways cross or meet.

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