Synonyms of 'shapeless'
having no definite shape or formShe never wore anything but shapeless black dresses.
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in the sense of amorphous
of no recognizable character or type
A dark, amorphous shadow filled the room.
in the sense of irregular
uneven in shape, position, arrangement, etc.
He had bad teeth, irregular and discoloured.
Thesaurus for shapeless from the Collins English Thesaurus