A point marks a location. It has no length, width, or height. In geometry, it is usually represented by a dot and labeled with a capital letter. The point is one of the undefined terms in Euclid's system, described by axioms rather than defined.

Points are the building blocks of geometry. Lines are made of infinitely many points. Planes contain infinitely many points. Two points determine a line; three non-collinear points determine a plane. Despite having no size, points are essential for describing position.

In coordinate geometry, a point is an ordered pair (x, y) or triple (x, y, z). In calculus, limits describe behavior near a point. In topology, points are elements of a space. The concept is abstract but fundamental to all of geometry and analysis.

• Location with no size
• Represented by a dot and labeled
• Undefined term in Euclidean geometry
• Coordinates describe points in space