injurious UK /ɪnˈdʒʊə.ɹɪ.əs/US /ɪnˈd͡ʒʊɹ.i.əs/ adjective2 •Causing physical harm or injury; harmful, hurtful. •Causing harm to one's reputation; invidious, defamatory, libelous, slanderous.This injurious explanation dethroned the remainder of Bunson's dignity entirely. — 1913 formsmore injurious · most injurious