monumental

Universal Words adjective 1 [usuallybeforenoun] very important and having a great influence, especially as the result of years of work: a monumental achievement * Gibbon's monumental work 'The Rise and Fall of the Roman Empire' 2 [onlybeforenoun] very large, good, bad, stupid, etc: a book of monumental significance * We have a monumental task ahead of us. * It seems like an act of monumental folly. * We must act now to avert a disaster of monumental proportions. 3 [onlybeforenoun] appearing in or serving as a monument: a monumental inscription / tomb * a monumental mason (= a person who makes monuments)