Definition of "xxviii" [xxviii]

• The cardinal number that is the sum of twenty-seven and one (noun)
• Being eight more than twenty (adjective)

WordNet. Princeton University. 2010.

• "He uses, and indeed quotes, with the freedom of a master, his great collection of the Italian Historians, in xxviii. volumes; and as that treasure is in my library, I have thought it an amusement, if not a duty, to consult the originals.] 14 I cannot refrain from transcribing the high-colored words of Pandulphus Pisanus, (p. 384.)"
• "Jean-Sylvain Bailly, Mémoires, in Avant-Moniteur ou Tableau sommaire des huit premiers mois de Révolution française Paris: Levrault, Schoell, 1805, xxviii."
• "IV.xxviii. 146b, On their heads [they] hadde sallets of leather."