a slip of paper, cloth, or other material, marked or inscribed, for attachment to something to indicate its manufacturer, nature, ownership, destination, etc.
a short word or phrase descriptive of a person, group, intellectual movement, etc.
a word or phrase indicating that what follows belongs in a particular category or classification: The following definition has the label “Archit.”
Architecture. a molding or dripstone over a door or window, especially one that extends horizontally across the top of the opening and vertically downward for a certain distance at the sides.
a brand or trademark, especially of a manufacturer of phonograph records, tape cassettes, etc.: She records under a new label.
the manufacturer using such a label: a major label that has produced some of the best recordings of the year.
Heraldry. a narrow horizontal strip with a number of downward extensions of rectangular or dovetail form, usually placed in chief as the cadency mark of an eldest son.
Obsolete. a strip or narrow piece of anything.
verb (used with object), labeled, labeling or (especially British) labelled, labelling.
to affix a label to; mark with a label.
to designate or describe by or on a label: The bottle was labeled poison.
to put in a certain class; classify.
Also, radiolabel. Chemistry. to incorporate a radioactive or heavy isotope into (a molecule) in order to make traceable.

1275–1325; Middle English < Middle French: ribbon, perhaps < Germanic. See lap1

labeler, noun
nonlabeling, adjective, noun
nonlabelling, adjective, noun
prelabel, noun, verb (used with object), prelabeled, prelabeling or (especially British) prelabelled, prelabelling.
relabel, verb (used with object), relabeled, relabeling or (especially British) relabelled, relabelling.
unlabeled, adjective
unlabelled, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
label (ˈleɪbəl)
1.  a piece of paper, card, or other material attached to an object to identify it or give instructions or details concerning its ownership, use, nature, destination, etc; tag
2.  a brief descriptive phrase or term given to a person, group, school of thought, etc: the label "Romantic" is applied to many different kinds of poetry
3.  a word or phrase heading a piece of text to indicate or summarize its contents
4.  a trademark or company or brand name on certain goods, esp, formerly, on gramophone records
5.  another name for dripstone
6.  heraldry a charge consisting of a horizontal line across the chief of a shield with three or more pendants: the charge of an eldest son
7.  computing a group of characters, such as a number or a word, appended to a particular statement in a program to allow its unique identification
8.  chem a radioactive element used in a compound to trace the mechanism of a chemical reaction
vb , -bels, -belling, -belled, -bels, -beling, -beled
9.  to fasten a label to
10.  to mark with a label
11.  to describe or classify in a word or phrase: to label someone a liar
12.  to make (one or more atoms in a compound) radioactive, for use in determining the mechanism of a reaction
[C14: from Old French, from Germanic; compare Old High German lappa rag]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

early 14c., "narrow band or strip of cloth," from O.Fr. label, lambel "ribbon, fringe" (Fr. lambeau "strip, rag, shred, tatter"), possibly from Frankish *labba (cf. O.H.G. lappa "flap"), from P.Gmc. *lapp- (see lap (n.)). Sense of "strip attached to a document to hold a seal"
evolved in M.E. (late 14c.), and general meaning of "tag, sticker, slip of paper" is from 1670s. Meaning "circular piece of paper in the center of a gramophone record" (1907), containing information about the recorded music, led to meaning "a recording company" (1952). The verb meaning "to affix a label to" is from c.1600; figurative sense of "to categorize" is from 1853. Related: Labeled; labeling; labelled; labelling.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
label   (lā'bəl)  Pronunciation Key 
See tracer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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