Matrix may refer to any of the following:
1. A matrix is a two-dimensional array of numbers useful in certain mathematical operations. They are particularly important in 3D computer graphics.
2. The Matrix is a sci-fi movie starring Keanu Reeves and Laurence Fishburne released on March 31, 1999. In the movie, powerful artificial intelligence machines have designed a simulated world to keep the minds of humans occupied while the energy of their bodies is chemically harvested.
3. Matrix may also be short for Matrix code.