amorphous
Americanadjective
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lacking definite form; having no specific shape; formless.
the amorphous clouds.
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of no particular kind or character; indeterminate; having no pattern or structure; unorganized.
an amorphous style; an amorphous personality.
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Petrography, Mineralogy. occurring in a mass, as without stratification or crystalline structure.
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Chemistry. not crystalline.
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Biology. having structural components that are not clearly differentiated, as the nuclear material in certain bacteria.
adjective
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lacking a definite shape; formless
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of no recognizable character or type
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(of chemicals, rocks, etc) not having a crystalline structure
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Not made of crystals. Glass, amber, and plastics are amorphous substances.
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Lacking definite form or shape.
Other Word Forms
- amorphism noun
- amorphously adverb
- amorphousness noun
Etymology
Origin of amorphous
First recorded in 1725–35, amorphous is from the Greek word ámorphos shapeless. See a- 6, -morph, -ous
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Casey Wasserman’s name has been scrubbed from the agency he founded decades ago, replaced with an amorphous moniker: “The Team.”
From Los Angeles Times • Mar. 9, 2026
Some industry insiders have asked whether the OpenClaw-Moltbook phenomenon is evidence of “artificial general intelligence,” an amorphous concept described throughout the history of AI development as a moment when machines achieve humanlike intelligence.
From The Wall Street Journal • Feb. 4, 2026
“Another more amorphous change is the culture…the new Boeing sounds a lot more like what Airbus would call humble, and that is no bad thing.”
From Barron's • Jan. 28, 2026
This amorphous metal is highly unstable and exists only as long as the stationary atoms continue to confine it.
From Science Daily • Dec. 11, 2025
This model was also equipped with built-in lifts and an amorphous surface, so that it could simulate walking up inclines and staircases.
From "Ready Player One: A Novel" by Ernest Cline
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
