A Quick and Simple Dictionary

complex

1. Adjective.  Made up of multiple parts; intricate or detailed.
2. Adjective.  Not simple or straightforward.
3. Adjective.  (mathematics) Of a number, of the form ''a + bi'', where ''a'' and ''b'' are real numbers and ''i'' is the square root of −1.
4. Adjective.  (geometry) A curve, polygon or other figure that crosses or intersects itself.
5. Noun.  A problem.
6. Noun.  A collection of buildings with a common purpose, such as a university or military base.
7. Noun.  A psychologically based dislike or fear of a particular thing.
8. Noun.  A thunderstorm that forms when two storm fronts collide.
9. Noun.  (chemistry) A structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules.
10. Verb.  (chemistry, intransitive) To form a complex with another substance.