binder

[bahyn-der]
noun
1.
a person or thing that binds.
2.
a detachable cover, resembling the cover of a notebook or book, with clasps or rings for holding loose papers together: a three-ring binder.
3.
a person who binds books; a bookbinder.
4.
Insurance. an agreement by which property or liability coverage is granted pending issuance of a policy.
5.
Agriculture.
a.
an attachment to a harvester or reaper for binding the cut grain.
b.
Also called self-binder. a machine that cuts and binds grain.
6.
Chemistry. any substance that causes the components of a mixture to cohere.
7.
Painting. a vehicle in which pigment is suspended.
8.
(in powder metallurgy) a substance for holding compacted metal powder together while it is being sintered.
9.
Building Trades.
a.
a stone, as a perpend, for bonding masonry.
b.
a girder supporting the ends of two sets of floor joists.
c.
a material for holding loose material together, as in a macadamized road.
d.
stirrup ( def 4 ).
10.
British, Australian Slang. a large quantity, especially of food.

Origin:
before 1000; Middle English, Old English; see bind, -er1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
binder (ˈbaɪndə)
 
n
1.  a firm cover or folder with rings or clasps for holding loose sheets of paper together
2.  a material used to bind separate particles together, give an appropriate consistency, or facilitate adhesion to a surface
3.  a.  a person who binds books; bookbinder
 b.  a machine that is used to bind books
4.  something used to fasten or tie, such as rope or twine
5.  informal (NZ) a square meal
6.  obsolete Compare combine harvester Also called: reaper binder a machine for cutting grain and binding it into bundles or sheaves
7.  an informal agreement giving insurance coverage pending formal issue of a policy
8.  a tie, beam, or girder, used to support floor joists
9.  a stone for binding masonry; bondstone
10.  the nonvolatile component of the organic media in which pigments are dispersed in paint
11.  Compare linker (in systemic grammar) a word that introduces a bound clause; a subordinating conjunction or a relative pronoun

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

binder
O.E. bindere "one who binds" (see bind). Of various things that bind, from early 16c.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

binder bind·er (bīn'dər)
n.
A broad bandage, especially one encircling the abdomen.

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 for binders
Binders are elastic leaves used to hold together the bunches of fillers.
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