sup·ple·ment

[n. suhp-luh-muhnt; v. suhp-luh-ment]
noun
1.
something added to complete a thing, supply a deficiency, or reinforce or extend a whole.
2.
a part added to a book, document, etc., to supply additional or later information, correct errors, or the like.
3.
a part, usually of special character, issued as an additional feature of a newspaper or other periodical.
4.
Geometry. the quantity by which an angle or an arc falls short of 180° or a semicircle.
verb (used with object)
5.
to complete, add to, or extend by a supplement.
6.
to form a supplement or addition to.
7.
to supply (a deficiency).
00:10
Supplement is one of our favorite verbs.
So is lollygag. Does it mean:
to bark; yelp.
to spend time idly; loaf.

Origin:
1350–1400; Middle English < Latin supplēmentum that by which anything is made full, equivalent to sup- sup- + plē- (stem of plēre to fill; see full1) + -mentum -ment

sup·ple·ment·er, noun
un·sup·ple·ment·ed, adjective
well-sup·ple·ment·ed, adjective

1. appendix, index, supplement (see synonym study at appendix) ; 2. complement, supplement (see synonym study at complement).


2. addendum, epilogue, postscript. See appendix. 5. See complement.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
supplement
 
n
1.  an addition designed to complete, make up for a deficiency, etc
2.  a section appended to a publication to supply further information, correct errors, etc
3.  a magazine or section inserted into a newspaper or periodical, such as one with colour photographs issued every week
4.  geometry
 a.  either of a pair of angles whose sum is 180°
 b.  sup, Abbreviation: supp an arc of a circle that when added to another arc forms a semicircle
 
vb
5.  (tr) to provide a supplement to, esp in order to remedy a deficiency
 
[C14: from Latin supplēmentum, from supplēre to supply1]
 
supplemen'tation
 
n
 
'supplementer
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

supplement
1382, from L. supplementum "something added to supply a deficiency," from supplere (see supply). The verb is first recorded 1829.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The form of a dietary supplement purchased in a drug store or health food store
  is likely not the same form used in research.
For those with low metabolisms, this may prove to be a beneficial hormonal
  supplement.
Essentially all informed skeptics accept that anthropogenic influences are
  many, varied, and supplement natural variations.
Architectural codes should be viewed as a supplement to an urban code.
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