The Collaborative International Dictionary of English v.0.48:

Milliary \Mil"li*a*ry\ (m[i^]l"l[i^]*[asl]*r[y^]), a. [L.
   milliarius containing a thousand, fr. mille thousand: cf. F.
   milliaire milliary. See Mile.]
   Of or pertaining to a mile, or to distance by miles; denoting
   a mile or miles.
   [1913 Webster]

         A milliary column, from which they used to compute the
         distance of all the cities and places of note.
                                                  --Evelyn.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Milliary \Mil"li*a*ry\, n.; pl. Milliaries. [L. milliarium.
   See Milliary, a.]
   A milestone.
   [1913 Webster]