/ ɪˈreləvəns; NAmE / (also less frequent ir·rele·vancy / -ənsi; NAmE / pl. -ies ) noun
1.
[ U ] lack of importance to or connection with a situation :
the irrelevance of the curriculum to children's daily life
OPP relevance
2.
[ C , usually sing. ] something that is not important to or connected with a situation :
His idea was rejected as an irrelevance.