city wall

perimeter wall; fence; CL:道[dao4]

firewall

Berlin Wall

(of a ghost, Wi-Fi signal etc) to pass through a wall

lit. to climb over the wall; fig. to breach the Great Firewall of China

human barricade; (soccer) defensive wall

Wailing Wall, or Western Wall (Jerusalem)

facade; external wall

crenelated parapet wall

gable

curtain wall (architecture)

firewall

to climb a wall; (fig.) to be unfaithful

whitewashed wall; to whitewash a wall

to paper a wall

parapet; defensive wall; breastwork

(literary) screen wall shielding an entrance in traditional Chinese architecture

(slang) (of a website) to get blocked

Western Wall, or Wailing Wall (Jerusalem)

courtyard wall

to sit on the fence (in a dispute)

(computing) paywall (loanword)

lit. Buddha jumps over the wall, name for a Chinese dish that uses many non-vegetarian ingredients

crenelated parapet wall

load-bearing wall

lit. windbreak; fig. protector

Democracy Wall, Beijing (1978–1979); bulletin boards modeled on it in some Hong Kong universities

plastered masonry wall

unplastered masonry wall

cavity wall; hollow wall

internecine strife (idiom); fighting among oneself

lit. to lead the water through the wall; to ask for trouble (idiom)

Berlin Wall

a cornered dog will jump over the wall (idiom); to be driven to desperate action

the fourth wall (in theater, TV, film etc)

the fourth wall (in theater, TV, film etc)

lit. the red apricot tree leans over the garden wall (idiom); fig. a wife having an illicit lover

(lit.) to tear down the east wall to repair the west wall (saying); (fig.) to rob Peter to pay Paul

useless (idiom); worthless; inept

see 爛泥扶不上牆|烂泥扶不上墙[lan4 ni2 fu2 bu4 shang4 qiang2]

(idiom) no secret can be kept forever