one of a body of armed guards who patrol a region.
(initial capital letter) a U.S. soldier in World War II specially trained for making surprise raids and attacks in small groups. Compare commando ( def 1 ).
a soldier specially trained in the techniques of guerrilla warfare, especially in jungle terrain.
a person who ranges or roves.
(especially in Texas) a member of the state police.
British. a keeper of a royal forest or park.
Building Trades. wale1 ( def 5 ).
(initial capital letter) one of a series of instrumented U.S. space probes launched in the 1960s that transmitted closeup pictures of the moon before impacting the lunar surface.

1350–1400; Middle English; see range, -er1

underranger, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
ranger (ˈreɪndʒə)
1.  (sometimes capital) an official in charge of a forest, park, estate, nature reserve, etc
2.  chiefly (US) Brit equivalent: warden a person employed to patrol a State or national park or forest
3.  (US) one of a body of armed troops employed to police a State or district: a Texas Ranger
4.  (in the US and certain other armies) a commando specially trained in making raids
5.  a person who wanders about large areas of country; a rover

Ranger or Ranger Guide1 (ˈreɪndʒə)
(Brit) a member of the senior branch of the Guides
Ranger Guide or Ranger Guide1

Ranger2 (ˈreɪndʒə)
any of a series of nine American lunar probes launched between 1961 and 1965, three of which transmitted to earth photographs of the moon

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

late 14c., "gamekeeper," from range (n.)). Attested from 1660s in sense of "man (often mounted) who polices an area." Modern military sense of "member of an elite U.S. combat unit" is attested from 1942 (organized 1941).
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica


in U.S. military usage, a soldier specially trained to act in small groups that make rapid surprise raids on enemy territory. Ranger has also been the designation for the Texas state constabulary and for national-park supervisors and forest wardens.

Learn more about ranger with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Crew members networked with every ranger and park supervisor they met.
Wilderness ranger and back-country guard jobs involve hiking trails by day and
  camping out at night, often alone.
They left the area and discussed this with the ranger.
Usually on a tour a ranger gathers everyone and, after a warning, switches off
  the lights.
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