零れい行ぎょう列れつれいぎょうれつMeanings1nounzero matrix; null matrixmathematicsA matrix in which all entries are zero. Used in linear algebra and related fields.零れい行ぎょう列れつは、任にん意いの行ぎょう列れつに足たしてもその行ぎょう列れつを変かえない。The zero matrix, when added to any matrix, does not change that matrix.