extraordinary; remarkable; exceptional

a singular success.

unusual or strange; odd; different

singular behavior.

being the only one of its kind; distinctive; unique

a singular example.

separate; individual.

Grammar . noting or pertaining to a member of the category of number found in many languages that indicates that a word form has one referent or denotes one person, place, thing, or instance, as English boy and thing, which are singular nouns, or goes, a singular form of the verb go. Compare dual ( def. 4 ) , plural ( def. 4 ) .

Logic .

of or pertaining to something individual, specific, or not general.

(of a proposition) containing no quantifiers, as Socrates was mortal.

Mathematics .

of or pertaining to a linear transformation from a vector space to itself that is not one-to-one.

of or pertaining to a matrix having a determinant equal to zero.

Obsolete . private.

Obsolete . single.

the singular number.

a form in the singular.

adjective

normal , ordinary , regular , usual , attached , combined , mixed , together

adjective

atypical , avant-garde , bizarre , breaking new ground , conspicuous , cool * , curious , eccentric , eminent , exceptional , extraordinary , loner , noteworthy , original , outlandish , out-of-the-way , outstanding , peculiar , prodigious , puzzling , queer , rare , remarkable , special , strange , uncommon , unimaginable , unordinary , unparalleled , unprecedented , unthinkable , unusual , unwonted , weird , certain , definite , discrete , exclusive , individual , one , only , particular , respective , single , sole , solitary , solo , unique , unrepeatable , separate , alone , incomparable , matchless , nonpareil , peerless , unequaled , unexampled , unmatched , unrivaled , magnificent , preeminent , towering , cranky , erratic , freakish , idiosyncratic , odd , quaint , quirky , unnatural , different , fantastic , isolated , lone , marvelous , novel , unconventional , whimsical