Definitions
1.NounA European species of flatfish having dull brown colouring with reddish-brown blotches; fluke, European flounder (Platichthys flesus).
2.NounAny of various flatfish of the family Pleuronectidae or Bothidae.
3.NounA bootmaker's tool for crimping boot fronts.
4.VerbTo act clumsily or confused; to struggle or be flustered."He gave a good speech, but floundered when audience members asked questions he could not answer well."
5.VerbTo flop around as a fish out of water.
6.VerbTo make clumsy attempts to move or regain one's balance."Robert yanked Connie's leg vigorously, causing her to flounder and eventually fall."
7.VerbTo be in serious difficulty.