Definitions
1.nounA structure composed of a plank, balanced in the middle, used as a game in which one person goes up as the other goes down.
2.nounA series of up-and-down movements.
3.nounA series of alternating movements or feelings.
4.verbTo use a seesaw.
5.verb(by extension) To fluctuate.
6.verbTo cause to move backward and forward in seesaw fashion.
7.adjectiveFluctuating.