WGS84 Share definition Flag World Geodetic System 1984. WGS 84 is an earth fixed global reference frame, including an earth model. It is used for GPS systems. The new CAP plane has a nice GPS but no freaking ADF or DME WTF? WGS84 by IrishRepublicanArmy January 4, 2004 0 0 Get merch Get the WGS84 mug. Buy Now — $32.95 See more merch