noun
A long, strong stake, one end of which is set firmly in the ground, and the other sharpened.
(military) A wall of wooden stakes, used as a defensive barrier.
A line of cliffs, especially one showing basaltic columns.
(biology) An even row of cells, e.g., palisade mesophyll cells.
verb
(transitive, usually in the passive, also intransitive) To equip with a palisade.