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Webster 1913 Edition
Underplot
Un′der-plotˊ
,Noun.
1.
A series of events in a play, proceeding collaterally with the main story, and subservient to it.
Dryden.
2.
A clandestine scheme; a trick.
Addison.
Webster 1828 Edition
Underplot
UN'DERPLOT
, n.1.
A series of events in a play, proceeding collaterally with the main story, and subservient to it.2.
A clandestine scheme.