Ranked or ranged below; subordinate; inferior; specifically (Mil.), ranking as a junior officer; being below the rank of captain; as, a subaltern officer.
- Lower in position or rank; secondary.
- Chiefly British Holding a military rank just below that of captain.
- Logic In the relation of a particular proposition to a universal with the same subject, predicate, and quality.
- A subordinate.
- Chiefly British A subaltern officer.
- Logic A subaltern proposition.