Which term refers to an element with a definite position but no size or shape in geometry?

A point is defined in geometry as a fundamental element that represents a location in space. It possesses a definite position but does not have any size, shape, length, or breadth. This is why a point can be thought of as an entity that indicates a specific location without any physical dimensions.

In contrast, a line is an infinite series of points extending in two directions, thus it has length but no width or depth. A plane is a flat surface that extends infinitely in two dimensions, characterized by length and width but lacking height. A polygon, on the other hand, is a closed figure made up of straight lines and thus has multiple properties, including size and shape. The unique attribute of a point is its ability to denote a precise location without any dimensions, which confirms that it is indeed the correct answer.