A member of a military organization having a rank between that of a commissioned and non-commissioned officer
A warrant officer is a person in the army, the air force, or the marines who is above the rank of sergeant and below the rank of lieutenant. In the United States Navy, a warrant officer is above the rank of petty officer and below the rank of ensign. A military officer, usually a skilled technician or a helicopter pilot, intermediate in rank between a noncommissioned officer and a commissioned officer, having authority by virtue of a warrant. a middle rank in the army, air force, or US Navy