- Skew lines are straight lines in a three dimensional form which are not parallel and do not cross.
An example of skew lines are the sidewalk in front of a house and a line running across the top edge of a side of a house.
Lines ab and cd are skew lines.
skew lines definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Math. two or more lines that lie in different planes, are not parallel, and do not intersect
skew lines definition by American Heritage Dictionary
Straight lines that are not in the same plane and do not intersect.