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progression

[ pruh-gresh-uhn ]
/ prəˈgrɛʃ ən /
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noun

the act of progressing; forward or onward movement.
a passing successively from one member of a series to the next; succession; sequence.
Mathematics. a succession of quantities in which there is a constant relation between each member and the one succeeding it.Compare arithmetic progression, geometric progression, harmonic progression.
Music. the manner in which chords or melodic tones follow one another; a succession of chords or tones.
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.

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Origin of progression

1400–50; late Middle English <Latin prōgressiōn- (stem of prōgressiō). See progress, -ion
pro·gres·sion·al, adjectivepro·gres·sion·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for progression

progression
/ (prəˈɡrɛʃən) /

noun

the act of progressing; advancement
the act or an instance of moving from one thing or unit in a sequence to the next
maths a sequence of numbers in which each term differs from the succeeding term by a constant relationSee also arithmetic progression, geometric progression, harmonic progression
music movement, esp of a logical kind, from one note to the next (melodic progression) or from one chord to the next (harmonic progression)
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
progressional, adjectiveprogressionally, 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

Scientific definitions for progression

progression
[ prə-grĕshən ]

See sequence.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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