out of commission
If something, such as a machine or a military ship, is out of commission it is broken or not available to be used.

[TahlilGaran] Advanced Learner's Dictionary ▲

out of commission
1.
broken or not working.
The explosion put the engine out of commission.

2.
not able to do the usual things.
After her knee surgery, she was out of commission for about eight weeks.

Usage notes: used to refer to a person who is ill or injured

[TahlilGaran] English Idioms Dictionary ▲

out of commission
to be broken, to be not operating
The old boat is out of commission and will not be operating for several months.

[TahlilGaran] English Idioms Dictionary ▲

out of commission
adj. phr.
1. Retired from active military service; no longer on active duty.
When the war was over, many warships were placed out of commission.
Antonym: IN COMMISSION¹.
2. Not in use or not working; so that it cannot work or be used.
The strike put the airline out of commission for a week.
John will have to walk to the store. His bicycle is out of commission.
Compare: OUT OF ORDER.
Antonym: IN COMMISSION².

[TahlilGaran] English Idioms Dictionary ▲