- A plumb line attached to a board, used by builders and surveyors.More example sentences
- It is customary in laying blocks to use a plumb rule to ascertain the level alignment of the block which is being positioned on the wall.
- It is used in a horizontal position as a level and in a vertical position as a plumb rule.
More definitions of plumb ruleDefinition of plumb rule in:
- The British & World English dictionary