Disappointment, n.
Etymology: [Cf. F. désappointement.]
1. The act of disappointing, or the state of being disappointed; defeat or failure of expectation or hope; miscarriage of design or plan; frustration. If we hope for things of which we have not thoroughly considered the value, our disappointment will be greater our pleasure in the fruition of them. Addison. In disappointment thou canst bless. Keble.
2. That which disappoints.
Syn. -- Miscarriage; frustration; balk.
Shades of meaning
Fernald has no entry of its own for disappointment; he lists it under chagrin, misfortune.
Where he writes about it:
Chagrin unites disappointment with some degree of humiliation. — from chagrin
A rainy day may bring disappointment; needless failure in some enterprise brings chagrin. — from chagrin
Any considerable disappointment, failure, or misfortune, as regards outward circumstances, as loss of fortune, position, and the like, when long continued or attended with enduring consequences, constitutes adversity. — from misfortune