legionary

adjective

1. of, relating to, or belonging to a legion.
2. constituting a legion or legions.

noun, plural le·gion·ar·ies.

3. History/Historical. a soldier of a Roman legion.
4. a member of the British Legion.
5. legionnaire(def 2).

adjective

1. of or relating to a legion

noun plural -aries

2. a soldier belonging to a legion