The Collaborative International Dictionary of English v.0.48:

Chagrin \Cha*grin"\, v. t. [imp. & p. p. Chagrined; p. pr. &
   vb. n. Chargrining.] [Cf. F. chagriner See Chagrin, n.]
   To excite ill-humor in; to vex; to mortify; as, he was not a
   little chagrined.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

chagrined \chagrined\ adj.
   feeling vexed, especially due to feeling inferior or unworthy
   and hence embarrassed; as, chagrined at the poor sales of his
   book.

   Syn: embarrassed, mortified.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

chagrined
    adj 1: feeling or caused to feel uneasy and self-conscious;
           "felt abashed at the extravagant praise"; "chagrined at
           the poor sales of his book"; "was embarrassed by her
           child's tantrums" [syn: abashed, chagrined,
           embarrassed]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "chagrined":
   abashed, afflicted, agitated, ashamed, beset, blushing, bothered,
   cast down, chapfallen, confused, crestfallen, crushed, discomfited,
   discomforted, discomposed, disconcerted, disquieted, distressed,
   disturbed, embarrassed, hangdog, humbled, humiliated, hung up,
   ill at ease, mortified, out of countenance, perturbed, put-out,
   put-upon, red-faced, shamed, shamefaced, shamefast, troubled,
   uncomfortable, uneasy, upset