DECOMMISSION Meaning of DECOMMISSION in English decommission BrE AmE ˌdiː kə ˈmɪʃ ə n▷ decommission|ed d▷ decommission|ing ‿ɪŋ▷ decommission|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012