{i} n.c.o., military officer who does not hold a commission, enlisted soldier given a position of command over other enlisted troops, noncom, officer without a commission (Military)
An NCO is a soldier who has a fairly low rank such as sergeant or corporal. NCO is an abbreviation for `non-commissioned officer'. Food for the ordinary Soviet troops and NCOs was very poor. noncommissioned officer. non-commissioned officer an officer of low rank in the British army