Meaning : The secrecy of police officers who lie or look the other way to protect other police officers.
Example :
The blue wall cracked when some officers refused to take part in the cover-up.
Synonyms : blue wall, wall of silence
Blue wall of silence ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Marathi. Blue wall of silence ka matlab kya hota hai?