frontier Hear it!

frontier definition

fron·tier (frun tir′; also frän-)

noun

  1. the border between two countries
  2. ☆
    1. that part of a settled, civilized country which lies next to an unexplored or undeveloped region
    2. the developing, often still uncivilized or lawless, region of a country
  3. any new field of learning, thought, etc. or any part of a field that is still incompletely investigated: often used in pl. the frontiers of medicine

Etymology: ME frontere < OFr frontier < front: see front

adjective

of, on, or near a frontier

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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