6 Definition
    noun
  
 (printing) Abbreviation of sexto, a book size using duodecimo-sized pages.
Wiktionary 
    symbol
  
 (music) Submediant, or the sixth scale degree.
Wiktionary 
Other Word Forms of 6
Noun
Singular:
 6Plural:
 6s(printing) Abbreviation of sexto, a book size using duodecimo-sized pages.
(music) Submediant, or the sixth scale degree.