1. One that is equal in importance, rank, or degree. 2. A set of articles, as of clothing or luggage, designed to match or complement one other, as in style or color. 3. Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed reference. 4. coordinate offices of a business. 5. Of or involving coordination. 6. Of or based on a system of coordinates. 7. To place in the same order, class, or rank. 8. coordinating the moving parts of a machine; coordinate the colors of a design. 9. The generators coordinate so that one is always running. 10. a nursing staff that coordinates smoothly. 11. shoes that coordinate with the rest of the outfit.