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.
Synonym: miscarriage, frustration, balk.
Origin: cf. F. Desappointement.