fulness /ˈfʊlnəs/ noun4 •Being full; completeness.The actor enjoyed the fullness of his success.She lived life in all its fullness. •The degree to which a space is full. •A measure of the degree to which a muscle has increased in size parallel to the axis of its contraction. A full muscle fills more of the space along the part of the body where it is connected. •(figurative) The degree to which fate has become known. formsfulnesses