Definition of "Slave"

Slaves or Slavì of Pomerania, with their confederates defeated near Lunden in Scania, […]

1766, An Universal History, from the Earliest Account of Time, volume XLIV, index

Moldavia and Wallachia, inhabited by Slaves nominally belonging to the Turkish empire, are in the actual military occupation of Russia. Servia, inhabited by the Slavic Serbs, is avowedly disloyal to the Porte, […]

1850 December, “Russian Ambition”, in The American Whig Review, page 622

It extended then far into Hungary, and the ancient limits of the land of these so-called Pannonic Slaves are the same which at present mark the extent of the language. […] A considerable number of Slaves in the Russian province of Silesia are said to speak the same languages slightly modified.

1853, Maximilian Schele De Vere, Outlines of Comparative Philology, page 350