on ∨ upon Meaning, Definition & Usage

Definitions
  1. . (a) To rush; to fall upon. Obs. (b) To have a view of; to be in sight of; to overlook; to look toward; to open upon; to front; to face. A Gallicism: cf. Fr. donner sur.
    Rooms which gave upon a pillared porch. Tennyson.
    The gloomy staircase on which the grating gave. Dickens.

Webster 1913