The word "amorphous" means "without form" or "shapeless." Something that is amorphous, then, is not well defined. Instead, it is sort of like a cloud that can change its shape very easily and is not of any specific shape for a long period of time. The word "amorphously" is an adverb meaning "in an amorphous manner." This word is used much less often than "amorphous" is.
Some ways in which you might use it include:
- Since I was looking at them from so far away, the individuals blended amorphously into a blurry mass.
- The octopus seemed to move amorphously, changing its shape as if it had no solid parts to its body.