Definitions
1.nounA piece of lead attached to a line, used in sounding the depth of water, a plumb bob or a plumb line
2.nounHence, any weight
3.nounA piece of lead formerly used by school children to rule paper for writing (that is, to mark with rules, with lines)
4.nounA plummet line, a line with a plummet; a sounding line
5.nounViolent or dramatic fall
6.nounA decline; a fall; a drop
7.verbTo drop swiftly, in a direct manner; to fall quickly."After its ascent, the arrow plummeted to earth."