Used for meanings directly deriving from the past participle of the verb 'ground' (confined as punishment, prevented from flying, electrically earthed).
Определения
Informal. Confined to one's home or deprived of privileges as a punishment.
If you miss curfew again, you'll be grounded for a month.
Of an aircraft, flight, or fleet: prevented from taking off or flying.
All planes were grounded because of the dense fog.
Electronics. Connected to the earth or to a common return path for electric current; earthed.
For safety, the appliance must be properly grounded.