legionary

legion +‎ -ary. From Latin legionarius.

legionary (not comparable)

1. Relating to, or consisting of, a legion or legions.

   a legionary force

2. Containing a great number.
   • 1646, Sir Thomas Browne, Pseudodoxia Epidemica (aka, Vulgar Errours), Google Books

     Unto whom (what is deplorable in men and Christians) too many applying themselves, betwixt jest and earnest, betray the cause of truth, and insensibly make up the legionary body of error.

legionary (plural legionaries)

1. (military, Ancient Rome) A soldier belonging to a legion; a professional soldier of the ancient Roman army.
2. A member of a legion, such as the American Legion, or of any organization containing the term legion in its title (e.g. the French Foreign Legion).

• (member of a Legion organisation): legionnaire

• (soldier of the Ancient Roman legion): contubernium, maniple, century, legion

• (soldier of the Ancient Roman legion): centurion

• o'erlaying