| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | highest in importance |
| Synonyms: | A-number-1, advanced, arch, champion, chief, dominant, eminent, first-class, first-string, foremost, greatest, head, head of the line, leading, main, number one, outstanding, paramount, predominant, preeminent, premier, primary, prime, primo, principal, ranking, ruling, sovereign, supreme, top of the list, top-flight |
| Antonyms: | last, least |