sui generis
In no category
Sui generis (Latin, "of its own kind") describes something unique, in a class by itself, not fitting any existing category.
The term appears in legal, academic, and cultural contexts when standard classifications fail: The European Union is sui generis—neither a federation nor a mere treaty organization.
It carries a formal, slightly learned tone.
Having no equivalent
- unclassifiableCannot be sorted
- singularOne in number
- incomparableWithout equal or rival
- nonpareilUnrivaled, beyond compare
matchless · inimitable · peerless · unparalleled · irreplaceable · distinctive · idiosyncratic · peculiar
Idiosyncratically unusual
- eccentricUnconventional in character
- odditySomething unusual or unexpected
- peculiarityUnusual distinguishing characteristic
- curiosityDesire to learn
outlier · maverick · nonconformist · iconoclast · misfit · outsider · rarity · anomaly
New and unusual
- inventiveShowing original thought
- creativeProducing original ideas
- innovativeIntroducing new ideas
- unconventionalDeparting from standard practice
unorthodox · groundbreaking · pioneering · trailblazing · experimental · avant-garde · visionary · imaginative
Systematic grouping by traits
- categoryA class of things
- taxonomyScience of categorical arrangement
- doctrineEstablished body of teachings
- precedentPrior authoritative example
jurisprudence · statutory · entity · corporation · sovereignty · jurisdiction · regulatory · tribunal
one-of-a-kind
Having no equivalent
- unclassifiableCannot be sorted
- singularOne in number
- incomparableWithout equal or rival
nonpareil · matchless · inimitable · peerless · unparalleled · irreplaceable · distinctive · idiosyncratic · peculiar · anomalous
quirky
Idiosyncratically unusual
- eccentricUnconventional in character
- odditySomething unusual or unexpected
- peculiarityUnusual distinguishing characteristic
curiosity · outlier · maverick · nonconformist · iconoclast · misfit · outsider · rarity · anomaly · freak
novel
New and unusual
- inventiveShowing original thought
- creativeProducing original ideas
- innovativeIntroducing new ideas
unconventional · unorthodox · groundbreaking · pioneering · trailblazing · experimental · avant-garde · visionary · imaginative · ingenious
classification
Systematic grouping by traits
- categoryA class of things
- taxonomyScience of categorical arrangement
- doctrineEstablished body of teachings
precedent · jurisprudence · statutory · entity · corporation · sovereignty · jurisdiction · regulatory · tribunal · designation
- rarityrare, scarce, uncommon, infrequent, scant
- Legal Latinab initio, bona fide, caveat emptor, certiorari, de facto
- Latin phrasesE pluribus unum, carpe diem, caveat emptor, veni vidi vici, ad astra
- LatinLatin, Latin vocabulary, Latin roots, Latin alphabet, Latin phrases
- Latin Legal Termsbona fide, caveat emptor, de facto, de jure, in absentia
sui generistypical
Representative of a kind
generic · common · ordinary · standard · conventional
sui generisderivative
Function's rate of change
imitative · copied · unoriginal · borrowed · secondhand
sui generisordinary
Standard, unremarkable
commonplace · unremarkable · mundane · pedestrian · everyday