Definitions

1. noun

A small ball of lead, especially one attached to a line or cord for fishing.

“The angler carefully set a plomb on the end of his fishing line.”

2. verb

To cover or encase in a layer of metal, especially lead.

“The artist plombed the statue with a thin layer of gold for decoration.”

3. verb

To make (a coin) heavier by adding a weight of lead to it.

“The mint plombed the coins to ensure they were within the required weight range.”