Dip of the horizon Meaning, Definition & Usage

Definitions
  1. (Astron.), the vertical angle between the sensible horizon and a line to the visible horizon, the latter always being below the former.
Definitions
  1. (Astron.), the angular depression of the seen or visible horizon below the true or natural horizon; the angle at the eye of an observer between a horizontal line and a tangent drawn from the eye to the surface of the ocean.

Webster 1913