Definition of 然う
- (adv) in that way (concerning the actions of the listener or concerning the ideas expressed or understood by the listener; with a neg. sentence, implies that something isn't as much as one might think); thus; such
もう私は大人だから、そうは考えない。
Now that I am a grownup, I think otherwise. - (int) so (used to express agreement with something said)
「腰は痛む?」「いや、別に」「そう、それは不幸中の幸いね」
"Does your back hurt?" "No, not really." "Oh, that's something then, isn't it?" - so? (used to express some doubt with something said)