from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Relating to or marking the distance of an ancient Roman mile, which equaled 1,000 paces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A milestone.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to a mile, or to distance by miles; denoting a mile or miles.
  • n. A milestone.

from The Century Dictionary and Cyclopedia

  • Pertaining to the ancient Roman mile of a thousand paces or five thousand Roman feet; marking a mile.
  • n. A milestone; specifically, a stone or column set up to form a point of departure in measuring distances.


Latin mīlliārius, consisting of a thousand, one mile long, from mīlle (passuum), a thousand (double paces), a Roman mile; see gheslo- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin milliarium. See milliary (adjective). (Wiktionary)



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