/,kɒmplɪ'keɪʃn; ,kɑmplə`keʃən/
n
1 [U] state of being complex, intricate or difficult; involved condition 复杂、错综或困难的状态; 复杂的情况
*I have enough complication in my life without having to look after your sick pets! 即使不给你照看那些生病的小宠物, 我生活里的麻烦事就已经够多了!
2 [C] thing that makes a situation more complex or difficult 使情况更加复杂或困难的事物
*A further complication was Fred's refusal to travel by air. 更麻烦的是弗雷德不肯坐飞机.
3 complications [pl] (medical 医) new illness, or new development of an illness, that makes treatment more difficult 并发症
*Complications set in, and the patient died. 病人因出现并发症而死亡.

n
[U and C]
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.
[C usually plural]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.