: to swing backward and forward like a pendulum
: to move or travel back and forth between two points
- he oscillates regularly between his comfortable home … and his downtown office-laboratory
- —Gladwin Hill
: to vary between opposing beliefs, feelings, or theories
- The mood of the voters has oscillated between optimism and pessimism.
: to vary above and below a mean value
- Bank rate oscillates between 2 and 6 percent.