Meaning of CONDITIONAL in English

CONDITIONAL

(SENTENCE FORM) [adjective] [not gradable], [noun] [specialized] - (relating to) a sentence, often starting with 'if' or 'unless', in which one half expresses something which is dependent on the other halfa conditional clause'If I won a lot of money, I'd go travelling' is an example of a conditional (sentence). [C]

Cambridge English vocab.      Кембриджский английский словарь.