amorphous

Adjective

1. Lacking a definite form or clear shape.
   • amorphous blob
   • The enormous pile of spaghetti landed on the floor in an amorphous heap.

   Synonyms: formless shapeless

   Antonyms: structured well-defined

2. Being without definite character or nature.
   • Gudrun, new from her life in Chelsea and Sussex, shrank cruelly from this amorphous ugliness of a small colliery town in the Midlands. Yet forward she went, through the whole sordid gamut of pettiness, the long...
   • And people talking all the time about the AfD is just what it wants: to foster the impression that the others are ganging up against it. The “authentic” voice of “real people” v the amorphous elite. - 2023 September 27,...
3. Lacking organization or unity.
4. In the non-crystalline solid state of, or being a non-crystalline counterpart to, a crystalline solid.
   • Near-synonym: noncrystalline
   • Glass is an amorphous solid, but some glass is called "crystal" because it looks crystalline and has been called crystal since before humans even understood molecular structure at all.

   Synonyms: noncrystalline

   Antonyms: crystalline crystal

5. Infinite and not the disjoint union of two infinite subsets.