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fluctuate

[fluhk-choo-eyt] /ˈflʌk tʃuˌeɪt/
verb (used without object), fluctuated, fluctuating.
1.
to change continually; shift back and forth; vary irregularly:
The price of gold fluctuated wildly last month.
2.
to move back and forth in waves.
verb (used with object), fluctuated, fluctuating.
3.
to cause to fluctuate.
Origin
1625-1635
1625-35; < Latin fluctuātus undulated, past participle of fluctuāre to flow, equivalent to fluctu(s) a flowing (derivative of fluere to flow) + -ātus -ate1
Related forms
nonfluctuating, adjective
unfluctuating, adjective
Synonyms
1. See waver1 . 2. oscillate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un fluctuating

fluctuate

/ˈflʌktjʊˌeɪt/
verb
1.
to change or cause to change position constantly; be or make unstable; waver or vary
2.
(intransitive) to rise and fall like a wave; undulate
Word Origin
C17: from Latin fluctuāre, from fluctus a wave, from fluere to flow
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 un fluctuating

fluctuate

v.

1630s, from Latin fluctuatus, past participle of fluctuare "to undulate" (see fluctuation). Related: Fluctuated; fluctuates; fluctuating.

Online Etymology Dictionary, © 2010 Douglas Harper
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un fluctuating in Medicine

fluctuate fluc·tu·ate (flŭk'chōō-āt')
v. fluc·tu·at·ed, fluc·tu·at·ing, fluc·tu·ates

  1. To vary irregularly.

  2. To rise and fall in waves; undulate.


fluc'tu·a'tion n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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