Simple Definition of complication

from our Learner's Dictionary

complication

noun

plural complications
1
: something that makes something harder to understand, explain, or deal with
The negotiations stalled when complications arose.
2
medical : a disease or condition that happens in addition to another disease or condition : a problem that makes a disease or condition more dangerous or harder to treat
Pneumonia is a common complication of AIDS.
She experienced complications during her pregnancy.
The patient died of complications from surgery.

Cite this Entry

“Complication.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/complication. Accessed 23 Jun. 2026.

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