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[hom-uh-nim] /ˈhɒm ə nɪm/
Phonetics. a word pronounced the same as another but differing in meaning, whether spelled the same way or not, as heir and air; a homophone (def 1).
a word that is both a homophone and a homograph, that is, exactly the same as another in sound and spelling but different in meaning, as chase “to pursue” and chase “to ornament metal.”.
(loosely) a word of the same written form as another but of different meaning and usually origin, whether pronounced the same way or not, as bear “to carry; support” and bear “animal” or lead “to conduct” and lead “metal;” a homograph.
Obsolete. a namesake.
Biology. a name given to a species or genus that has already been assigned to a different species or genus and that is therefore rejected.
Origin of homonym
1635-45; < Latin homōnymum < Greek homṓnymon, neuter of homṓnymos homonymous
Related forms
homonymic, adjective
homonymity, noun
Can be confused
homograph, homonym, homophone (see synonym study at the current entry)
1–3. Three similar terms— homophone, homograph, and homonym —designate words that are identical in pronunciation, spelling, or both, while differing in meaning and usually in origin.
Homophones (“same” + “sound”) are different words that sound alike, whether or not they are spelled alike. Thus pair “two of a kind,” pare “cut off,” and pear, the fruit, are homophones because they sound exactly the same, even though each is spelled differently. But bear “carry or support” and bear, the animal, are homophones that not only sound alike but are also spelled alike.
Homographs (“same” + “writing”) are different words that are spelled the same but may or may not have the same pronunciation. The homographs sound “noise,” sound “healthy,” and sound, “a body of water,” for example, are spelled and pronounced the same way. However, words with the same spelling but different pronunciations are also homographs. Familiar examples are the pairs row roʊroh “line” and row raʊrou “fight” as well as sewer ˈsu ərsoo-er “conduit for waste” and sewer ˈsoʊ ərsoh-er “person who sews.” Their identical spellings define them as homographs no matter how they are said.
The word homonyms (“same” + “names”) is, strictly speaking, either a synonym for homophones or a name for words that are at once homophones and homographs —alike in both spelling and pronunciation—such as the two words spelled b-e-a-r and the three spelled s-o-u-n-d. As a practical matter, however, the terms homophone, homograph, and homonym are often distinguished from one another by the contexts in which they are found. Homophone and homograph —the first focused on sound and the second on spelling—appear primarily in technical or academic writing, where fine distinctions are important. The more familiar word homonym, heard in classrooms from early grades on, has become an all-inclusive term that describes not only words that are both homophonic and homographic, but words that are either one or the other. In common parlance, then, words that sound alike, look alike, or both, can be called homonyms. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for homonymity


one of a group of words pronounced or spelt in the same way but having different meanings Compare homograph, homophone
a person with the same name as another
(biology) a name for a species or genus that should be unique but has been used for two or more different organisms
Derived Forms
homonymic, homonymous, adjective
homonymity, homonymy, noun
Word Origin
C17: from Latin homōnymum, from Greek homōnumon, from homōnumos of the same name; see homo-, -onym
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
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Word Origin and History for homonymity



1807, from French homonyme and directly from Latin homonymum (Quintilian), from Greek homonymon, neuter of homonymos, from homos "same" (see homo- (1)) + onyma, dialectal form of onoma "name" (see name (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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