Without a clear shape or form: An amorph lacks a discernible form and so it can be described as having an irregular or an undefined shape or structure.

The sculptor took a lump of clay that was an amorph and molded it quickly into a rough human form.

The lawyer did not present any reasonable arguments in defense of his client, Mary Jones; instead, he presented a collection of unsupported amorphs that persuaded no one to acquit her of the charges.