| Part of Speech | Definition | |
| Adjective | 1. Incapable of being rebutted.[Websters]
2. Being unanswerable, unassailable or impregnable. [Eve - graph theoretic] 3. Rarely used base adjective of the adverb irrebuttably.[Eve - graph theoretic] | |
| Adverb Form (irrebuttably) | 1. Virtually never used adverbial inflection of the rarely used adjective irrebuttable.[Eve - graph theoretic] | |
Source: Webster's Revised Unabridged Dictionary (1913), compiled from various sources, under license. | Top | |
Date "IRREBUTTABLE" was first used in popular English literature: sometime before 1914. (references) |
