Definition:Singular


 * Predicate Logic:
 * Singular Statement: A statement made about an object which is identified by means of a proper name.


 * Matrix Algebra:
 * Singular Matrix: a square matrix without an inverse.


 * Set Theory:
 * Singular Cardinal: one whose cofinality is less than itself.


 * Analysis:
 * Singular Point

Also see

 * Definition:Singularity
 * Definition:Degenerate
 * Definition:Regular