verb, -cat⋅ed, -cat⋅ing, adjective | 1. | to make complex, intricate, involved, or difficult: His recovery from the operation was complicated by an allergic reaction. |
| 2. | complex; involved. |
| 3. | Entomology. folded longitudinally one or more times, as the wings of certain insects. |
| 1. | composed of elaborately interconnected parts; complex: complicated apparatus for measuring brain functions. |
| 2. | difficult to analyze, understand, explain, etc.: a complicated problem. |