Thursday \Thurs"day\, n. [OE. [thorn]ursdei, [thorn]orsday, from the Scand. name Thor + E. day. Icel. [thorn][=o]rr Thor, the god of thunder, is akin to AS. [thorn]unor thunder; D. Donderdag Thursday, G. Donnerstag, Icel. [thorn][=o]rsdagr, Sw. & Dan. Torsdag. [root]52. See Thor, Thunder, and Day.]

The fifth day of the week, following Wednesday and preceding Friday.

Holy Thursday. See under Holy.

Source: Webster's Revised Unabridged Dictionary (1913)