Related topics: Illness and Disability
1 [uncountable and countable]
a problem or situation that makes something more difficult to understand or deal with:
The fact that the plane was late added a further complication to our journey.
2 [countable usually plural]MI medical
a medical problem or illness that happens while someone is already ill and makes treatment more difficult:
Pneumonia is one of the common complications faced by bed-ridden patients.