106739990 an explanation of the cause of some phenomenon; "the reason a steady state was never reached was that the back pressure built up too slowly".
105651680 the capacity for rational thought or inference or discrimination; "we are told that man is endowed with reason and capable of distinguishing good from evil".
114379829 the state of having good sense and sound judgment; "his rationality may have been impaired"; "he had to rely less on reason than on rousing their emotions".
