thinkable /ˈθɪŋkəbəl/adjective 2noun 1forms 3 adjective2 •Able to be thought or imagined; conceivable.Marx held that a society from which all sources of conflict, aggression, and evil have been thus extirpated was not only thinkable, but was historically imminent. — 1978 •(rare) Morally acceptable or legal. noun1 •Something that can be thought about. formsthinkables · more thinkable · most thinkable