singular

1. (grammar) Referring to only one thing or person.Antonyms: plural

2. (linear algebra, of matrix) Having no inverse.Synonyms: non-invertibleAntonyms: invertible, non-singular

3. (linear algebra, of transformation) Having the property that the matrix of coefficients of the new variables has a determinant equal to zero.

4. (set theory, of a cardinal number) Not equal to its own cofinality.

5. (chiefly law) Each; individual.Examples: "to convey several parcels of land, all and singular"; "Cel[adon]. […] Hovv do Meliſſa’s tvvo fair Daughters? / Aſt[eria]. VVhen you tell me vvhich of ’em you are in love vvith, I’le anſvver you. / Cel. VVhich of ’em, naughty ſiſter, vvhat a question’s there? VVith both of ’em, vvith each and singular of ’em."

6. (obsolete) Engaged in by only one on a side; single.Examples: "Thus made he an end, and the two princes allowed well of his last motion, and so order was taken, that they should fight togither in a singular combat"obsolete