WEIGHTY

adj. 1 heavy, ponderous, massive, huge, bulky, substantial, ample, large, mammoth, colossal, immense, enormous, gigantic, prodigious; corpulent, fat, obese, adipose, Colloq hefty I found myself face to face with a rather weighty gentleman who was blocking the doorway 2 important, consequential, significant, momentous, grave, crucial, portentous, thought-provoking, provocative These are weighty matters and should be handled with circumspection 3 influential, convincing, persuasive, impressive, telling, powerful, potent, leading; forceful Weighty arguments have been put forward in support of these proposals