Jejune, a.
[ad. L. jjn-us fasting.]

1. Without food, fasting; hungry. Obs.

2. Deficient in nourishing or substantial (physical) qualities; thin, attenuated, scanty; meagre, unsatisfying; (of land) poor, barren.

3. a. Unsatisfying to the mind or soul; dull, flat, insipid, bald, dry, uninteresting; meagre, scanty, thin, poor; wanting in substance or solidity. Said of thought, feeling, action, etc., and esp. of speech or writing; also transf. of the speaker or writer. (The prevailing sense.)

b. Puerile, childish; also, naïve.

¶This use may owe its origin to the mistaken belief that the word is connected with L. juvenis young (comp. junior), or F. jeune young.

jejune gut: = JEJUNUM. Obs

Oxford English Dictionary. 2nd ed. 1989 (ed. J. A. Simpson and E. S. C. Weiner), Additions 1993-7 (ed. John Simpson and Edmund Weiner; Michael Proffitt), and 3rd ed. (in progress) Mar. 2000- (ed. John Simpson). OED Online. Oxford University Press. <http://oed.com>