From Longman Dictionary of Contemporary Englishmomentousmo‧men‧tous /məʊˈmentəs, mə- $ moʊ-, mə-/ adjective IMPORTANTa momentous event, change, or decision is very important because it will have a great influence on the future a momentous decision Momentous events are taking place in the US. His colleagues all recognized that this was a momentous occasion. one of the most momentous days in British sport► see thesaurus at important
Examples from the Corpus
momentous• At the time, our department was going through some momentous changes.• In the physical sciences alone, there were momentous changes.• At this point William made a momentous decision -- he resigned from his job and joined the army.• The revolution taking place in eastern Europe must be counted as one of the most momentous events of this century.• At first the momentous events unfolding in Rome seemed barely relevant.• Such a thing would have momentous implications.• Henceforth she must carry on from where she had started that momentous morning in Goddy's office.• Able leaders inspire groups engaged in less momentous projects as well.• a momentous shift in policy• Something momentous was bound to happen soon.• Indeed, 1989 was a momentous year.momentous decision• So he made what turned out to be a momentous decision.• Within a decade, she was making momentous decisions about the Pentagon Papers and Watergate.• This was to be a momentous decision although he did not know it at the time.• We stand on the brink of two momentous decisions at Maastricht.• Yet Major did not choose to discuss the momentous decision he was about to take with his wife.• It was as if she had made her decision, her momentous decision to marry, sleepwalking.• At the age of two, a male makes a momentous decision-whether to become adult or to stay young. 