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progression

[pruh-gresh-uh n] /prəˈgrɛʃ ən/
noun
1.
the act of progressing; forward or onward movement.
2.
a passing successively from one member of a series to the next; succession; sequence.
3.
Mathematics. a succession of quantities in which there is a constant relation between each member and the one succeeding it.
4.
Music. the manner in which chords or melodic tones follow one another; a succession of chords or tones.
5.
Astrology. any of a variety of methods of comparing the natal chart to subsequent planetary positions in order to establish an optimum time to accomplish things or to establish the probable time an event occurred or will occur.
Origin
late Middle English
1400-1450
1400-50; late Middle English < Latin prōgressiōn- (stem of prōgressiō). See progress, -ion
Related forms
progressional, adjective
progressionally, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for progressional

progression

/prəˈɡrɛʃən/
noun
1.
the act of progressing; advancement
2.
the act or an instance of moving from one thing or unit in a sequence to the next
3.
(maths) a sequence of numbers in which each term differs from the succeeding term by a constant relation See also arithmetic progression, geometric progression, harmonic progression
4.
(music) movement, esp of a logical kind, from one note to the next (melodic progression) or from one chord to the next (harmonic progression)
5.
(astrology) one of several calculations, based on the movement of the planets, from which it is supposed that one can find the expected developments in a person's birth chart and the probable trends of circumstances for a year in his life
Derived Forms
progressional, adjective
progressionally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for progressional

progression

n.

late 14c., "action of moving from one condition to another," from Old French progression and directly from Latin progressionem (nominative progressio) "a going forward, advancement, growth, increase," noun of action from past participle stem of progredi "go forward," from pro- "forward" (see pro-) + gradi "to step, walk," from gradus "step" (see grade (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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progressional in Science
progression
  (prə-grěsh'ən)   
See sequence.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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