irrelevant 3 antonyms and opposites of irrelevant. Adj — Not connected to or useful for the matter at hand. Synonyms for irrelevant beside the mark beside the point immaterial impertinent irrelative moot nongermane nonpertinent off-topic orthogonal otiose tangential unapt ungermane Antonyms for irrelevant relevant foreign pertinent ← Back to the full definition of irrelevant
