A narrow strip of timber with a plumb line hanging as a result, always test verticality.
a narrow board with a plumb line, employed by designers and carpenters.
A narrow board with parallel edges having a straight line drawn through the middle, and a string carrying a metal body weight affixed in the top end of the range. It is used by masons, bricklayers, carpenters, etc., for determining a vertical.
A theory or system of social reform which contemplates a complete reconstruction of society with a more just and equitable distribution of property and labor In popular usage the term is often employed to indicate any lawless revolutionary social scheme See Communism Fourierism Saint Simonianism forms of socialism...