complication: Meaning and Definition of

com•pli•ca•tion

1. the act of complicating.
2. a complicated or involved state or condition.
3. a complex combination of elements or things.
4. something that introduces, usually unexpectedly, some difficulty, problem, change, etc.: Because of the complications involved in traveling during the strike, we decided to postpone our trip.
5. a concurrent disease, accident, or adverse reaction that aggravates the original disease.
6. the act of forming a unified idea or impression from a number of sense data, memories, etc.