knowledgeable UK /ˈnɒl.ɪ.d͡ʒə.bəl/US /ˈnɑ.lɪ.d͡ʒə.bəl/adjective 2noun 1forms 3 adjective2 •Having knowledge, especially of a particular subject. •Educated and well-informed. noun1 •(India) A person who has knowledge; an informed party. formsknowledgeables · more knowledgeable · most knowledgeable