the British naval ensign, consisting of the red cross of St. George on a white field, with the British union occupying the upper quarter along the hoist.
Origin
1875-80
British Dictionary definitions for white ensign
White Ensign
noun
1.
the ensign of the Royal Navy and the Royal Yacht Squadron, having a red cross on a white background with the Union Jack at the upper corner of the vertical edge alongside the hoist Compare Red Ensign, Blue Ensign