subs. (colloquial).—Immaturity of judgment; inexperience; gullibility.
1748. T. DYCHE, A New General English Dictionary (5 ed.). GREENNESS (s.) … also the rawness, unskilfulness, or imperfection of any person in a trade, art, science, etc.
1838. JAS. GRANT, Sketches in London, ch. vi., p. 205. Instances of such perfect simplicity or GREENNESS, as no one could have previously deemed of possible existence.
