alter

[awl-ter]
verb (used with object)
1.
to make different in some particular, as size, style, course, or the like; modify: to alter a coat; to alter a will; to alter course.
2.
to castrate or spay.
verb (used without object)
3.
to change; become different or modified.

Origin:
1350–1400; Middle English < Old French alterer < Late Latin alterāre to change, worsen, derivative of Latin alter other

alterer, noun
half-altered, adjective
prealter, verb (used with object)
realter, verb
unaltering, adjective
well-altered, adjective

altar, alter.


1. See adjust, change.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
alter (ˈɔːltə)
 
vb
1.  to make or become different in some respect; change
2.  informal chiefly (US) (tr) castrate a euphemistic word for spay
 
[C14: from Old French alterer, from Medieval Latin alterāre to change, from Latin alter other]
 
'alterable
 
adj
 
'alterably
 
adv
 
altera'bility
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

alter
late 14c., "to change (something)," from O.Fr. alterer, from M.L. alterare "to change," from L. alter "the other (of the two)," from PIE *al- "beyond" + comp. suffix -ter (cf. other). Intransitive sense "to become otherwise" first recorded 1580s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ALT (ā'ěl-tē')
n.
Alanine aminotransferase; an enzyme in serum and body tissues that catalyzes the transfer of amino acid groups from l-alanine to 2-ketoglutarate or the reverse, thus allowing nitrogen to be excreted or incorporated into other compounds.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The repeal of the controversial law alters the field for training officers on
  college campuses.
Color is a fundamental part of a city's skin, and it alters moods and
  perceptions.
To protect the privacy of his subjects, he says, he resorts to pseudonyms and
  alters biographical details.
There is something about being in water and swimming which alters the writer's
  mood, gets his thoughts going, as nothing else can.
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