Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia.
Related to wall up: canal wall up mastoidectomy
1. To fill, seal, or close an opening with a wall. A noun or pronoun can be used between "wall" and "up." If we wall up the small pedestrian entrances dotted around the perimeter of the fortress, it will force the enemy to come through the main gates. I'll never understand why they walled up the door to the garden outside.
2. To erect a wall or similar barrier in order to enclose or imprison someone or something in some place. A noun or pronoun can be used between "wall" and "up." The memories of my son's room are too painful to confront, so I've chosen to just wall it up. The fascists had simply walled up their political prisoners and left them to rot as they fled from the occupied territory.
wall something up
1. to seal something up behind a wall. We simply walled the old furnace up. It was cheaper than removing it. They walled up the old furnace.
2. to fill up an opening, such as a window or door, by building a wall. We will have to hire someone to wall the doorway up. They walled up the doorway.
1. To block or close something, such as an opening or passage, with or as if with a wall: The safety inspector walled up the old mine shaft. The contractor walled the abandoned building up.
2. To confine or seal someone or something behind or as if behind a wall: The contractors walled up the wiring. In the fairy tale, a witch walled Rapunzel up in a tower.
3. To form a steep vertical surface. Used of an ocean wave: The wave walled up perfectly, and I dropped in.