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 COMMISSION 1 . 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 COMMISSION 2 .