| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | important; serious |
| Synonyms: | big, chips are down, consequential, considerable, critical, crucial, decisive, earth-shaking, earth-shattering, epochal, eventful, far-reaching, fateful, grave, heavy, heavy number, historic, material, meaningful, memorable, notable, of moment, outstanding, pivotal, significant, substantial, vital, weighty |
| Notes: | momentary means fleeting, brief; momentous means significant and having great consequence |
| Antonyms: | immaterial, insignificant, trifling, trivial, unimportant |