Homonym: singular (Unique)
The term "singular" refers to something that is unique or one of a kind. In grammar, it describes a noun or pronoun that represents a single entity, such as cat or he. For example, in the sentence "The dog barks," "dog" is a singular noun because it refers to one specific animal.
In mathematics, "singular" can describe a situation where a function or matrix does not behave normally, such as having no inverse. A singular matrix is one that has a determinant of zero, indicating that it does not have a unique solution in a system of equations.