- (obsolete) To have the same value as.
- To counteract, counterbalance or neutralize.
- To compensate for.
1603, John Florio, transl.; Michel de Montaigne, Essayes, printed at London: Edward Blount, OCLC 946730821:, I.38:
- I am one of those who thinke their fruit can no way countervaile this losse.
- Upon balancing the account, the profit at last will hardly countervail the inconveniences that go along with it.
to counteract, counterbalance or neutralize
to compensate for