amor·​phous | \ə-ˈmȯr-fəs \

Definition of amorphous 

1a : having no definite form : shapeless an amorphous cloud mass

b : being without definite character or nature : unclassifiable an amorphous segment of society

c : lacking organization or unity an amorphous style of writing

2 : having no real or apparent crystalline form an amorphous mineral

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Other Words from amorphous

amorphously adverb
amorphousness noun

Synonyms & Antonyms for amorphous


formless, shapeless, unformed, unshaped, unstructured


formed, shaped, shapen, structured

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Examples of amorphous in a Sentence

Astronomers think our solar system took shape when an amorphous interstellar cloud of dust and gas collapsed under its own weight. The conservation of angular momentum, or spin, kept some of the material from simply falling all the way to the newborn sun; instead it settled into a pancake shape. — Michael W. Werner et al., Scientific American, June 2009 Most library and academic accrediting associations either ignore weeding or have general, rather amorphous, standards. Among the more specific standards are those of the American Library Associations' 1967 public library systems standards, which suggest annual weeding of at least 5 percent of "community collections," with headquarters libraries weeding more cautiously … LJ Special Report, 1990 A quarter of a century ago, author Betty Friedan stumbled upon a "problem that has no name."" Middle-class American women were prisoners of gilded cages, she argued, unfulfilled by their exclusive roles as wives and mother. Friedan gave the amorphous problem, and the book that described it, a name—"The Feminine Mystique"—and with it helped launch one of the most transforming social movements in modern history." — Eloise Salholz et al., Newsweek, 31 Mar. 1986 Oblivious to all the attention, the big cat calmly sashayed to a concave little hollow scooped out of an artificial granite cliff-side at the rear of her cage. There, her four sleeping, newborn cubs were nestled one atop another so tightly that they formed one amorphous lump of fur. — Jon Luoma, Audubon, November l982 an amorphous segment of society amorphous lumps of clay magically transformed by a skilled potter's hands into works of art
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Recent Examples on the Web

This acts like a magnet, pulling grime and gunk off your skin.a porous black solid, consisting of an amorphous form of carbon, obtained as a residue when wood, bone, or other organic matter is heated in the absence of air. Allure, "The Skin-Care Glossary: A Comprehensive Guide to Everything You Need to Know," 17 Aug. 2018 Eaton DC, which is the first of a number of such venues planned for Hong Kong, Seattle, and San Francisco, will be part hotel, part co-working space, part amorphous center for progressive causes. Vogue, "Lobby Hero: Katherine Lo's New Hotel Touts Progressive Politics, Down the Street from the Trump International," 20 July 2018 Ssion, the wonderfully chaotic project of visual artist and musician Cody Critcheloe, has been amorphous from the start. Rachel Hahn, Vogue, "Ssion on His New Album O and His Absurdist, Sequin-Filled Sense of Style," 2 July 2018 Nor is this to suggest that the Singapore summit was a failure: if minimal and a little amorphous, the goodwill gestures seem real. David Volodzko, The New Republic, "The Corporate Gangs Who Could Profit From Trade With North Korea," 26 June 2018 But unfortunately the membership in a particular social group is completely amorphous. Fox News, "Woolsey: Trump keeps the North Koreans off balance," 12 June 2018 Mike Pence's top job: 'Be prepared' Pence’s portfolio is far-reaching, yet amorphous and unclear, Brower says. Maureen Groppe, Indianapolis Star, "Why Mike Pence's selection as VP was seen as a reward for his faithfulness and other revelations in new book," 12 June 2018 The two-dimensional screens compose a visual field corresponding to the amorphous white space through which the dancers move. Christopher Knight,, "'Made in L.A. 2018': Why the Hammer biennial is the right show for disturbing times," 5 June 2018 At least two of them—an Obi-Wan Kenobi movie and a Boba Fett movie—would be like Solo, prequels set in an amorphous time period before Lucas’s original films. David Sims, The Atlantic, "With Solo, Has Star Wars Fatigue Set In?," 29 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'amorphous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of amorphous

circa 1731, in the meaning defined at sense 1a

History and Etymology for amorphous

Greek amorphos, from a- + morphē form

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Statistics for amorphous

Last Updated

12 Nov 2018

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Time Traveler for amorphous

The first known use of amorphous was circa 1731

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More Definitions for amorphous



English Language Learners Definition of amorphous

: having no definite or clear shape or form


amor·​phous | \ə-ˈmȯr-fəs \

Medical Definition of amorphous 

1 : having no apparent shape or organization

2 : having no real or apparent crystalline form

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Comments on amorphous

What made you want to look up amorphous? Please tell us where you read or heard it (including the quote, if possible).


a nest or breeding place

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