Ray
A never-ending straight path that goes in one direction is called a line. Euclid, the Greek mathematician, described it as "breathless length".
a road......?
It is called a line segement
A line is a straight path that extends infinitely or endlessly in opposite directions. A straight path that joins two points is called a line segment.
A geodesical path
a line
A line.
light travels in straight paths called rays
Line.
it is simply called a line
The shortest path between two points is called a geodesic. In flat (Euclidean) space it is simply a straight line.
it is called a ray