Of a thing: To prove false to, disappoint the expectation of, fail (a person). Obsolete.

To cheat (hopes, expectations, aims, or a person in them); to disappoint, to foil. Obsolete.

transitive. To play with (any one) to his injury or frustration, under pretence of acting seriously; to mock, esp. in hopes, expectations, or…

Now the usual sense. transitive. To thwart (a person, group, etc.) with regard to an aim, intention, hope, etc.; to frustrate (a person) in (also †of)…

To disappoint, balk. Const. of.

Of things: To fail, disappoint the hopes of. Obsolete.

loosely. To cheat, disappoint. Obsolete.

transitive. To deceive or impose upon; to delude, befool; to tantalize, disappoint.

transitive. To balk, disappoint (a person).

transitive. Of things: To elude, baffle (efforts, vigilance, etc.).

To baffle, disappoint. Obsolete.

transitive. To place a balk in the way of. To frustrate, foil, render unsuccessful.

To lower in position, intensity, strength, or †value; to depress; to abase, humble. Also, to disappoint; to fail in supporting, aiding, or…

With up. To defraud or swindle; to disappoint. Australian slang.