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singular (EN)
adjective, noun

adjective “singular”

base form singular (more/most)
  1. (grammar) referring to one person or thing
    The word “cat” is a singular noun, but “cats” is plural.
  2. unusual or strange; not ordinary
    Many found his singular behavior at the party rather repelling.
  3. unique; the only one of its kind
    The artist created a singular piece that was unlike any other.
  4. exceptionally good or great; remarkable
    She showed singular bravery during the emergency.
  5. being a single person or thing, not more
    In this case, we are focusing on the singular event that triggered the changes.
  6. (mathematics, of a matrix) not invertible; having a determinant equal to zero
    When a matrix is singular, it cannot be used to solve a system of equations.

noun “singular”

singular singular, plural singulars
  1. (grammar) the form of a word that refers to only one person or thing
    As a teacher, she explained the difference between singulars and plurals to her students.