Definitions
1.nounA deal to swap goods or services.
2.nounA conservative; originally tied to Nicaraguan counter-revolutionaries.
3.nounAn entry (or account) that cancels another entry (or account)."The sum for each contra account is shown in the last column."
4.nounAny of the musical instruments in the contrabass range, e.g. contrabassoon, contrabass clarinet or, especially, double bass.
5.nounA contra dance.
6.nounA country dance.