1) is it possible to use the verb "to turn" instead of "to become"? For example, is the sentence "he wasn't a good child but turned (to be) a good man when got older" correct? If so, can I omit "to be"? The expression "turned out" is used. He turned out to be a nice man after all.
2) can I say "the traffic light became red"? No; traffic lights turn green, then turn yellow, then turn red - or they change to red, etc.
3) in this post, I used the expression "in the meaning of" in the first question. is it good English? should/could I say it differently? See above.