Meaning of PLUMMET in English
noun hence, any weight.
2. plummet ·noun a plumb bob or a plumb line. ·see under plumb, ·noun.
3. plummet ·noun a piece of lead attached to a line, used in sounding the depth of water.
4. plummet ·noun a piece of lead formerly used by school children to rule paper for writing.
Webster English vocab. Английский словарь Webster. 2012