Pronunciation: (u-môr'fus),[key] —adj. 1. lacking definite form; having no specific shape; formless: the amorphous clouds. 2. of no particular kind or character; indeterminate; having no pattern or structure; unorganized: an amorphous style; an amorphous personality. 3. Petrog.,Mineral.occurring in a mass, as without stratification or crystalline structure.
4. Chem.not crystalline.
5. Biol.having structural components that are not clearly differentiated, as the nuclear material in certain bacteria.