Pronunciation (UK) IPA (key): /ɪmˈpɔːtəns/ (US) IPA (key): /ɪmˈpɔrtəns/ or [-ʔn̩s] Audio (US)(file) Noun Singular importance Plural none Importance is on the Academic Vocabulary List. (uncountable) The importance of something, is how important it is. This section needs someone to add example sentences to it.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads