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.
1 Neutral element, a special type of element in mathematics with respect to a binary operation on a set, such that if that binary operation is applied to any element in that set, that element is left unchanged. 2  Also known as the identity element. 3  Neutral solution, a chemical solution which is neither acidic nor basic. Neutral solution, a chemical solution which is neither acidic nor basic. 2  Neutral particle, a particle without electrical charge. 3  Neutral vector, a multivariate random variable that exhibits a particular type of statistical independence (Dirichlet distribution).