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1. having or formed by four sides
2. a polygon having four sides. A complete quadrilateral consists of four lines and their six points of intersection

A plane figure bounded by four straight lines. If two of the lines are parallel, it is a trapezium. If two pairs of lines are parallel, it is a parallelogram. An equilateral parallelogram is a rhombus. A right-angled rhombus is a square.

(civil engineering)
References in periodicals archive ?
Hold off on giving out the glue--you don't want students to glue until they've had some time to play around and design their quadrilateral nutcrackers.
The Taliban leaders have not yet officially responded to the quadrilateral approach.
Can they make other quadrilaterals that share the same criteria?
There is only one family of tilings with vertex corona consisting of quadrilateral, hexagon and 12-gon.
She was able to construct counterexamples to the converse implication by starting with two perpendicular segments (the diagonals) and then completing to a (convex) quadrilateral Q for which A = 1/2 x [d.
We use the hp-FEM method for computing the modulus of a bounded quadrilateral and here we will apply the same method for the exterior modulus and another method, AFEM [5], for the sake of comparison, as in [12].
Within the group of 38 X-rayed patients, femoral abduction was discovered in the majority of the standard-aligned quadrilateral sockets.
We started the activity by asking students to construct any quadrilateral and its midpoint quadrilateral using GSP.
Mapped mesh, boundary layer and extruded mesh generation including triangular, quadrilateral, tetrahedral, wedge, pyramidal and hexahedral elements.
By dividing up a quadrilateral into two triangles you can see that the sum of the internal angles of a triangle must be 180 degrees.
INDIA'S 'GOLDEN Quadrilateral Highway' project--a 5,846 kilometre loop linking New Delhi, Mumbai, Bangalore and Kolkata--is a symbol of national pride in this emerging economic power.
Using the Wesleyan Quadrilateral, I now look at this interpretation of John 14:6 along with my own experiences, my tradition, and reason to consider the salvation of non-Christians.

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