abstergent UK /əbˈstɜː(ɹ)d͡ʒn̩t/US /æbˈstɝ.d͡ʒn̩t/adjective 1noun 1forms 3 adjective1 •Cleansing, detergent. noun1 •A substance used to cleanse; a detergent. formsabstergents · more abstergent · most abstergent