Com`pli*ca"tion (?), n. [L. compliasion: cf. F. complication.]

1.

The act or process of complicating; the state of being complicated; intricate or confused relation of parts; entaglement; complexity.

A complication of diseases. Macaulay.

Through and beyond these dark complications of the present, the New England founders looked to the great necessities of future times. Palfrey.

2. [Medicine|Med.]

A disease or diseases, or adventitious circumstances or conditions, coexistent with and modifying a primary disease, but not necessarily connected with it.

© [Webster 1913].

Complication (definition)