Pronunciation (UK) (US) IPA (key): /kənˈd͡ʒɛst.ʃən/ or /-ˈd͡ʒɛʃ.d͡ʒən/ Audio (UK)(file) Noun Singular congestion Plural congestions Congestion occurs when there is a blockage of the passage due to the buildup of something. The traffic report states that there is a severe traffic congestion down the road. Related words congestWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads