of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
radically new or innovative; outside or beyond established procedure, principles, etc.: a revolutionary discovery.
(initial capital letter) of or pertaining to the american revolution or to the period contemporaneous with it in U.S. history: Revolutionary heroes; Revolutionary weapons.
noun, plural revolutionaries.
a revolutionist.

1765–75; revolution + -ary

revolutionarily, adverb
revolutionariness, noun
antirevolutionary, noun, plural antirevolutionaries, adjective
nonrevolutionary, adjective, noun, plural nonrevolutionaries.
post-Revolutionary, adjective
prerevolutionary, adjective
prorevolutionary, adjective
semirevolutionary, adjective, noun, plural semirevolutionaries.
ultrarevolutionary, adjective, noun, plural ultrarevolutionaries.
unrevolutionary, adjective

2. unprecedented, novel, drastic, unorthodox. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To revolutionary
World English Dictionary
revolutionary (ˌrɛvəˈluːʃənərɪ)
n , pl -aries
1.  a person who advocates or engages in revolution
2.  relating to or characteristic of a revolution
3.  advocating or engaged in revolution
4.  radically new or different: a revolutionary method of making plastics
5.  rotating or revolving

Revolutionary (ˌrɛvəˈluːʃənərɪ)
1.  chiefly (US) of or relating to the conflict or period of the War of American Independence (1775--83)
2.  of or relating to any of various other Revolutions, esp the Russian Revolution (1917) or the French Revolution (1789)

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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Example sentences
Greg began developing a revolutionary animal-borne research tool to record
  images, sound, and data from an animal's perspective.
Marvel at the revolutionary imaging system used to guide a surgeon's scalpel in
  a delicate brain-tumor operation.
It has been a while since a truly revolutionary discovery in physics has been
  made, maybe this is it.
Students with mobile phones and video cameras teach the farmers revolutionary
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