block. 1  a solid mass of wood, stone, etc., usually with one or more flat or approximately flat faces. 2  a hollow masonry building unit of cement, terra cotta, etc.: a wall made of concrete blocks. 3  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. a piece of wood used in the art of making woodcuts or wood engravings. Printing. the base on which a plate is mounted to make it type-high.
Definition of NEUTRAL WIRE. : the wire in a three-wire distribution system usually required to be grounded for safety of both linemen and householders. ADVERTISEMENT.This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.ote that some information is displayed differently in the Unabridged. To access the complete Unabridged Dictionary, with an additional 300,000 words that aren't in our free dictionary, start a free trial.
These conductors are designated as follows: 1  Hot: The black wire is the hot wire, which provides a 120 VAC current source. 2  Neutral: The white wire is called the neutral wire. It provides the return path for the current provided by the hot wire. 3  Ground: The bare wire is called the ground wire.