Friday \Fri"day\, n. [AS. friged[ae]g, fr. Frigu, the gooddes of marriage; friqu love + d[ae]g day; cf. Icel. Frigg name of a goddess, the wife of Odin or Wodan, OHG. Fr[=i]atag, Icel. Frj[=a]dagr. AS. frigu is prob. from the root of E. friend, free. See Free, and Day.]

The sixth day of the week, following Thursday and preceding Saturday.

Source: Webster's Revised Unabridged Dictionary (1913)