ponderable /ˈpɒndəɹəbəl/adjective 3noun 1forms 3 adjective3 •Having a detectable amount of matter; having a measurable mass. •Worthy of note; significant, interesting. •(rare) Heavy; ponderous.The very mother's head you swore by in the dock is a heavier head, crowned with ponderable hair. — 1936 noun1 •(rare) Something that is ponderable formsponderables · more ponderable · most ponderable