noun a subaltern proposition.
2. subaltern ·adj asserting only a part of what is asserted in a related proposition.
3. subaltern ·noun a person holding a subordinate position; specifically, a commissioned military officer below the rank of captain.
4. subaltern ·adj ranked or ranged below; subordinate; inferior; specifically (mil.), ranking as a junior officer; being below the rank of captain; as, a subaltern officer.