plummet Meaning, Definition & Usage

  1. noun the metal bob of a plumb line
    plumb bob; plumb.
  2. verb drop sharply
    plump.
    • The stock market plummeted

WordNet

Plum"met noun
Etymology
OE. plommet, OF. plommet, fr. plom, plum, lead, F. plomb. See Plumb.
Definitions
  1. A piece of lead attached to a line, used in sounding the depth of water.
    I'll sink him deeper than e'er plummet sounded. Shak.
  2. A plumb bob or a plumb line. See under Plumb, n.
  3. Hence, any weight.
  4. A piece of lead formerly used by school children to rule paper for writing.

Webster 1913