[thinking] n (14c) 1: the action of using one's mind to produce thoughts
2. a: opinion, judgment "I'd like to know your ~ on this" b: thought that is characteristic (as of a period, group, or person) "the current student ~ on fraternities"
[2]thinking adj (1681): marked by use of the intellect: rational "~ citizens" -- think.ing.ly adv -- think.ing.ness n