In classical geometry, a point is an entity that has no extent.
In the modern set theoretic approach to topology, this is formalised as: a point in a spaceX is simply an element of the set X.
... Peter Arnold Heise[?], composer
1833 - Melville Weston Fuller[?] 8th Cchief Justice of the United States[?]
1839 - Josiah Willard Gibbs theoretical physicist, ...