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.
What does neutral mean in science? A: In science, neutral means one of three things: something that is gray and without hue or zero chroma; something that does not have a charge and is not magnetized; or something that does not exhibit acid or alkaline qualities.