Bathometer and Depth

noun

• An instrument that measures the depth of water.
  • synonyms: bathymeter

(n.) An instrument for measuring depths, especially one for taking soundings without a sounding line.

noun

• The extent downward or backward or inward.
  • usage: "the depth of the water"; "depth of a shelf"; "depth of a closet"
  • synonyms: deepness
• Degree of psychological or intellectual profundity.
• Usually plural. ( the deepest and most remote part)
  • usage: "from the depths of darkest Africa"; "signals received from the depths of space"
• Usually plural. ( a low moral state)
  • usage: "he had sunk to the depths of addiction"
• The intellectual ability to penetrate deeply into ideas.
  • synonyms: astuteness, profundity, profoundness, deepness
• The attribute or quality of being deep, strong, or intense.
  • usage: "the depth of his breathing"; "the depth of his sighs" "the depth of his emotion"

• (n.) A pair of toothed wheels which work together.
• (n.) The number of simple elements which an abstract conception or notion includes; the comprehension or content.
• (n.) Lowness; as, depth of sound.
• (n.) That which is deep; a deep or the deepest, part or place; the deep; the middle part; as, the depth of night or of winter.
• (n.) Profoundness; extent or degree of intensity; abundance; completeness; as, depth of knowledge or color.
• (n.) The quality of being deep; deepness; perpendicular measurement downward from the surface or horizontal measurement backward from the front; as, the depth of a river; the depth of a body of troops.
• (n.) The perpendicular distance from the chord to the farthest point of an arched surface.

(DoD, NATO) In maritime/hydrographic use, the vertical distance from the plane of the hydrographic datum to the bed of the sea, lake, or river.