(1) Mass movement so slow it's imperceptible, measured in millimeters or centimeters per year, that occurs on almost all slopes.
(2) Slow mass movement of soil, stone, sand, and grit down steep slopes, mostly by gravity but helped by water-saturated soil and freeze-thaw cycles.
(1) Surprising but true: the earth is creeping downhill, all over, everywhere, possibly in your direction.
(2) That creep you saw yesterday? You didn't. It moves too slowly. The mass movement kind. You must have seen Ed.