| complex | |
| 1. adj. Made up of multiple parts; composite; not simple. | |
| a complex being; a complex idea | |
| 2. adj. Not simple, easy, or straightforward; complicated. | |
| 3. adj. (mathematics) Of a number, of the form a + bi, where a and b are real numbers and i is a square root of −1. | |
| complex function | |
| 4. adj. (geometry) A curve, polygon or other figure that crosses or intersects itself. | |
| 5. n. A network of interconnected systems. | |
| military-industrial complex | |
| 6. n. A collection of buildings with a common purpose, such as a university or military base. | |
| 7. n. An assemblage of related things; a collection. | |
| 8. n. (psychology) A psychological dislike or fear of a particular thing. | |
| Jim has a real complex about working for a woman boss. | |
| 9. n. An organized cluster of thunderstorms. | |
| 10. n. (chemistry) A structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules. | |
| 11. n. (math) A complex number. | |
| 12. v. (chemistry, intransitive) To form a complex with another substance | |
| 13. v. To complicate. | |
