amorphous

1. (by extension) Being without definite character or nature.Examples: "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 amorphous, gritty street."; "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."broadly

2. (by extension) Lacking organization or unity.broadly

3. (physics) In the non-crystalline solid state of, or being a non-crystalline counterpart to, a crystalline solid.Examples: "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."Antonyms: crystalline#Adjective, crystal#Adjective

4. (set theory, of a set) Infinite and not the disjoint union of two infinite subsets.