(EXPLAIN) [verb] [T] - to say what the meaning of (something, esp. a word) is, or to explain and state the meaning and exact limits of (something)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)?It's impossible to define (= know and state) exactly what makes him so attractive.Your rights and responsibilities are defined (= their limits are stated) 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.See also well-defined.
DEFINE
Meaning of DEFINE in English
Cambridge English vocab. Кембриджский английский словарь. 2012