n., v., adj., & adv.
--n.
1. a a device consisting of a long plank balanced on a central support for children to sit on at each end and move up and down by pushing the ground with their feet. b a game played on this.
2 an up-and-down or to-and-fro motion.
3 a contest in which the advantage repeatedly changes from one side to the other.
--v.intr.
1. play on a see-saw.
2 move up and down as on a see-saw.
3 vacillate in policy, emotion, etc.
--adj. & adv. with up-and-down or backward-and-forward motion (see-saw motion).
Phrases and idioms:
go see-saw vacillate or alternate.
Etymology: redupl. of SAW(1)