B2to say what the meaning of something, especially a word, is: In this dictionary 'reality' is defined as 'the state of things as they are, rather than as they are imagined to be'.Before I answer your question, could you define your terms a little more (= explain what you mean by the words you have used)?→ See alsowell definedDefining and explainingB2to explain and describe the meaning and exact limits of something: Your rights and responsibilities are defined in the citizens' charter.Your role in the project will be strictly defined (= limited to particular areas).I'd hate to feel that I was defined by(= that my life got its meaning and importance only from) my job.Defining and explainingdefinable
/dɪˈfaɪ.nə.bl̩/adjective›definable rules of grammar/syntaxDefining and explaining