A table of data. / The cavity or mold in which anything is formed. / (biology) The material or tissue in which more specialized structures are embedded.

A minor modern religion based on the science-fiction franchise The Matrix.

(science fiction) A simulated reality to which many humans are connected. In some works created by sentient machines to subdue humans.

plural of matrix

(business, of an organisation) Using matrix management.

(linear algebra) A square (n×n) matrix that has fewer than n linearly independent eigenvectors, and is therefore not diagonalisable.

(graph theory) A square n⨯n matrix which describes an undirected graph of n vertices by letting rows and columns correspond to vertices, letting its diagonal elements contain the degrees of corresponding vertices and letting its non-diagonal elements contain either −1 or 0 depending on whether there is or there is not (respectively) an edge connecting the pair of corresponding vertices.

(linear algebra) Matrix obtained by appending the columns of two given matrices, usually for the purpose of performing the same elementary row operations on each of the given matrices.

(linear algebra) A matrix consisting of the coefficients of the variables in a set of linear equations. The matrix is used in solving systems of linear equations.

plural of active matrix