B1
to make someone feel unhappy because someone or something was not as good as they had expected
Dictionary examples:
The chef's 'mystery meat' disappointed diners when it turned out to be tofu. (0.0)
The 'all-you-can-eat' buffet disappointed us by closing after our first plate. (0.0)
My 'unbreakable' phone disappointed me by shattering when I dropped it on a pillow. (0.0)
We don't want to disappoint the fans. (20.5)
I'm sorry to disappoint you, but I'm afraid I can't come after all. (24.6)