Meaning of LINEAR in English

(LINES) [adjective] - consisting of or to do with linesA linear diagram of the car might be more informative than a full-colour illustration.(figurative) These mental exercises are designed to break linear thinking habits (= habits of thought in which one idea follows directly from another one) and encourage the creativity that is needed for innovation.(figurative) For most people life is a linear affair which involves a steady progression from one stage to the next.(figurative) Is there a linear (= direct) relationship between salaries and productivity? I mean if someone's pay is doubled, will they work twice as hard?

Cambridge English vocab.      Кембриджский английский словарь.