onliest

Adjective

only (not comparable)

1. Alone in a category.
   • He is the only doctor for miles.

   Synonyms:

   lone, sole, individual, first and last, one, one and only, single, singular, solitary, unitary

2. Singularly superior; the best.
   • Motley's the only wear.c. 1598–1600 (date written), William Shakespeare, “As You Like It”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount...

   Synonyms:

   nonpareil, peerless, unequaled, alone, azygous, incomparable, matchless, singular, sui generis, unique

3. Without sibling; without a sibling of the same gender.
   • He is their only son, in fact, an only child.
4. (obsolete) Mere.
   • I know some who wittingly have drawne both profit and preferment from cuckoldrie, the only name whereof is so yrksome and bail-ful to so many men.1603, Michel de Montaigne, chapter 40, in John Florio, transl., The Essayes […], book I, London: […] Val[entine] Simmes for Edward Blount […], →OCLC

   Synonyms:

   alone, simple, very, bare, just, mere

See all 16 meanings of only