[adjective] - needed in order to achieve a particular resultHe lacks the necessary skills for the job.I don't have much time so I won't be staying any longer than necessary.Just do what's necessary and then leave.If necessary, we can always change the dates of our trip.Is it necessary for all of us to be present at the meeting this afternoon?We don't want to take any more luggage with us than is strictly necessary.Necessary can be used in negatives and questions to show that you disapprove of something and do not think it should be used or done.I really don't think that sort of language is necessary on television.Was it really necessary for you to say that?A necessary evil is something which you do not like doing but which you know must be done.I think he regards work as a necessary evil.
Meaning of NECESSARY in English
Cambridge English vocab. Кембриджский английский словарь. 2012