If the two lines lie in the same plane, and they do not intersect, then they are parallel. If they are not in the same plane, and do not intersect, then they are called skew lines.
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Two parallel lines never meet or intersect. Two lines that aren't parallel must have one point somewhere where they intersect.
are two lines that are not parallel, coplanar, and do not intersect
Two lines that are not parallel and do not intersect are skew. If the non-intersecting lines are in the same plane then they are parallel.
Two parallel lines.
2 parallel lines are lines that will never intersect