4 An invitation to dinner was soon
afterwards dispatched; and already had
Mrs. Bennet planned the courses that
were to do credit to her housekeeping, when an
answer arrived which deferred it all. Mr. Bingley
was obliged to be in town the following day, and,
consequently, unable to accept the honour of their
invitation, etc. Mrs. Bennet was quite
disconcerted.
Which is the best definition for the word
disconcerted as it is used in this sentence?