a hollow masonry building unit of cement, terra cotta, etc.: a wall made of concrete blocks. one of a set of cube-shaped pieces of wood, plastic, or the like, used as a child's toy in building. a mold or piece on which something is shaped or kept in shape: a hat block.
Neutral powers during World War II. The neutral powers were countries that remained neutral during World War II. Some of these countries had large colonies abroad or had great economic power.
Neutral is a circuit conductor that normally carries current, and is connected to ground (earth) at the main electrical panel. In the electrical trade, the conductor of a 2-wire circuit connected to the supply neutral point and earth ground is referred to as the neutral.round or earth in a mains (AC power) electrical wiring system is a conductor that provides a low-impedance path back to the source to prevent hazardous voltages from appearing on equipment. (The terms ground and earth are used synonymously here.