fail to meet the hopes or expectations of; " Her boyfriend let her down when he did not propose marriage"

To defeat of expectation or hope; to hinder from the attainment of that which was expected, hoped, or desired; to balk; as, a man is disappointed of his hopes or expectations, or his hopes, desires, intentions, expectations, or plans are disappointed; a bad season disappoints the farmer of his crops; a defeat disappoints an enemy of his spoil.

To frustrate; to fail; to hinder of result.

To fall to gratify; to defeat of hope; frustrate; fail to keep an appointment with.

Disappointed.

To deprive one of what he expected: to frustrate.

To frustrate of expectation or hope.

To defeat the expectation, hope, or desire of ( a person).

To frustrate ( a hope or plan).

To defeat what is expected or intended; to fail to gratify one's wish; to frustrate; to balk.

To defeat expectation; to frustrate; to foil; to balk; to hinder from possession or enjoyment.

Rather than disappoint her mistress, she was quite capable of tearing up the letter, on her way home, and saying nothing about it. – Blind Love by Wilkie Collins

It is my task to disappoint his mistress, as he terms her, though it must be confessed that she does not sleep at her post." – The Water-Witch or, The Skimmer of the Seas by James Fenimore Cooper

Rob always did as I told him, and he will not disappoint me now. – More About Peggy by Mrs G. de Horne Vaizey

I can't disappoint any one. – The Great Impersonation by E. Phillips Oppenheim

Do not disappoint me. – A Little Girl in Old Philadelphia by Amanda Minnie Douglas

If free in the full sense of the word, they would not disappoint this expectation. – Complete State of the Union Addresses from 1790 to the Present by Various

Ida would have liked to have accepted it, and was sorry that her refusal seemed to disappoint Mrs. Heron, who retired as nervously as she had entered. – At Love's Cost by Charles Garvice

I did not like to disappoint Tom, but at the same time, as I should thereby be avoiding danger, it was just the request to which I could not well agree. – Paddy Finn by W. H. G. Kingston

I never knew a red- headed gal to disappoint a fellow yet." – The Comings of Cousin Ann by Emma Speed Sampson

I dared not disappoint him by telling him that I loved Charley Osborne. – Wilfrid Cumbermede by George MacDonald

All these are good gifts, all these are solid, all these will last, not one of them will disappoint you. – A Peep Behind the Scenes by Mrs. O. F. Walton

Lisette was to have accompanied them, but she was suffering from a headache, and, rather than disappoint the girls, Mrs. Farrington said that just for this once they might go shopping alone in the motor- car with the chauffeur. – Patty in Paris by Carolyn Wells

" I know I disappoint you," she continued. – His Sombre Rivals by E. P. Roe

" It will disappoint him mightily," Henley said, a sudden feeling of aversion to the subject on him. – Dixie Hart by Will N. Harben

I do not think that he will disappoint you. – A People's Man by E. Phillips Oppenheim

Even now he need not disappoint his mother. – The Higher Court by Mary Stewart Daggett

For heaven's sake, don't disappoint us all! – The Great Impersonation by E. Phillips Oppenheim

Curiously enough the news, instead of pleasing, seemed to disappoint him. – The Lost Valley by J. M. Walsh

He knew Howard, who, after Jack was through, said he hoped Mr. Bills would wait; it would be a pity to disappoint the girl when she had come so far. – The Cromptons by Mary J. Holmes

I hope 'twon't disappoint you! – Max by Katherine Cecil Thurston