# deviation

[dee-vee-ey-shuh n]

- the act of deviating.
- departure from a standard or norm.
- Statistics. the difference between one of a set of values and some fixed value, usually the mean of the set.
- Navigation. the error of a magnetic compass, as that of a ship, on a given heading as a result of local magnetism.Compare variation(def 8).
- Optics.
- Also called deflection.the bending of rays of light away from a straight line.
- angle of deviation.

- departure or divergence from an established dogma or ideology, especially a Communist one.

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## Origin of deviation^{}

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## deviation

- an act or result of deviating
- statistics the difference between an observed value in a series of such values and their arithmetic mean
- the error of a compass due to local magnetic disturbances

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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

## Word Origin and History for deviative

## deviation

### n.

1640s, noun of action from deviate (v.). Statistical sense is from 1858. Related: Deviational.

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Online Etymology Dictionary, © 2010 Douglas Harper

## deviation

(dē′vē-ā′shən)- A turning away or aside from a normal course.
- An abnormality.
- Deviant behavior or attitudes.
- The difference, especially the absolute difference, between one number in a set and the mean of the set.

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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

## deviation

[dē′vē-ā′shən]

- The difference between one number in a set and the mean of the set.

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