[noun] [C]A complication is something which makes a situation more difficult.Dave couldn't find his passport at the airport and then there were further complications when Fiona lost her baggage.Have you thought of the practical complications of doing what you suggest?If any complications arise, let me know and I'll help.A complication is also an additional medical problem which makes it more difficult to treat an existing illness.If there are no complications, the doctor says that she'll be able to come home within two weeks.
COMPLICATION
Meaning of COMPLICATION in English
Cambridge English vocab. Кембриджский английский словарь. 2012