noun, verb, -sad⋅ed, -sad⋅ing.| 1. | a fence of pales or stakes set firmly in the ground, as for enclosure or defense. |
| 2. | any of a number of pales or stakes pointed at the top and set firmly in the ground in a close row with others to form a defense. |
| 3. | Botany. palisade parenchyma. |
| 4. | palisades, a line of cliffs. |
| 5. | to furnish or fortify with a palisade. |
| the upper layer of ground tissue in a leaf, consisting of elongated cells beneath and perpendicular to the upper epidermis and constituting the primary area of photosynthesis. |