[dʒɪˈdʒuːn], (Adjective)

Definitions:
- naive, simplistic, and superficial
(e.g: their entirely predictable and usually jejune opinions)

- (of ideas or writings) dry and uninteresting.


Phrases:

Origin:
early 17th century: from Latin jejunus ‘fasting, barren’. The original sense was ‘without food’, hence ‘not intellectually nourishing’