1. [noun] A long, strong stake, one end of which is set firmly in the ground, and the other sharpened.
2. [noun] A wall of wooden stakes, used as a defensive barrier.
3. [noun] A line of cliffs, especially one showing basaltic columns.
4. [noun] (biology) An even row of cells. e.g.: palisade mesophyll cells.
5. [verb] (transitive) (usually in the passive) To equip with a palisade.
6. [noun] Fortification consisting of a strong fence made of stakes driven into the ground.
7. [verb] Surround with a wall in order to fortify.