1. A matrix is a two-dimensional array of numbers.
2. A matrix is a rectangular array of elements arranged in rows and columns.
3. A matrix is a collection of values stored in cells arranged in rows and columns (or axes).
4. A matrix is a table of data.
5. A matrix is a set of numbers arranged in rows and columns, where each row represents a different variable and each column represents a different value of that variable.
6. A matrix is a generalization of a table.
7. A matrix is a mathematical object consisting of a number of rows and columns.
8. A matrix is a type of data structure that stores information about a quantity of interest
9. A matrix is a representation of a linear transformation.
10. A matrix is a square array of numbers.
11. A matrix is a 2D array of numbers.
12. A matrix is a multidimensional array of numbers.
13. A matrix is a way of representing a function.
14. A matrix is a tool for solving systems of equations.