ˈwater-ˌcolourist [f. water-colour + -ist.] One who paints in water-colours. 1850in Ogilvie.1870Daily News 2 Dec., The old water⁓colourists dwell in a medium of perpetual beeswing.1874R. Tyrwhitt Sketch. Club 20 If you have any very patient, keen and skilful water-colourist among you.