Pronunciation: (sē'sô"),[key] —n. 1. a recreation in which two children alternately ride up and down while seated at opposite ends of a plank balanced at the middle.
2. a plank or apparatus for this recreation.
3. an up-and-down or a back-and-forth movement or procedure.
4. Whist.a crossruff.
—adj. moving up and down, back and forth, or alternately ahead and behind: It was a seesaw game with the lead changing hands many times.
—v.i. 1. to move in a seesaw manner: The boat seesawed in the heavy sea. 2. to ride or play on a seesaw.
3. to keep changing one's decision, opinion, or attitude; vacillate.