27 irrelevant synonyms include beside the point, not to the point, immaterial, not pertinent, not germane, off the subject, neither here nor there, and peripheral. Irrelevant is an adjective, and its antonyms are relevant and pertinent. Here are some additional synonyms for "irrelevant" with example sentences.
27 other ways to say irrelevant.
His argument included many irrelevant points.
She dismissed the irrelevant comments quickly.
That detail is completely irrelevant today.