Singular

Singular may refer to:
 * Singular, the grammatical number that denotes a unit quantity, as opposed to the plural and other forms
 * Singular or sounder, a group of boar, see List of animal names
 * Singular (band), a Thai jazz pop duo
 * Singular: Act I, a 2018 studio album by Sabrina Carpenter
 * Singular: Act II, a 2019 studio album by Sabrina Carpenter

Mathematics

 * Singular homology
 * SINGULAR, an open source Computer Algebra System (CAS)
 * Singular matrix, a matrix that is not invertible
 * Singular measure, a measure or probability distribution whose support has zero Lebesgue (or other) measure
 * Singular cardinal, an infinite cardinal number that is not a regular cardinal
 * Singular point of a curve, in geometry