dis ‧ ap ‧ point W3 /ˌdɪsəˈpɔɪnt/ BrE AmE verb [intransitive and transitive]
[ Word Family: adjective : ↑ disappointed , ↑ disappointing ; verb : ↑ disappoint ; noun : ↑ disappointment ; adverb : ↑ disappointingly ]
[ Date: 1400-1500 ; Language: Old French ; Origin: desapointier , from apointier 'to arrange' ]
1 . to make someone feel unhappy because something they hoped for did not happen or was not as good as they expected:
I hated to disappoint her.
Great things were expected of this band, and they didn’t disappoint.
2 . disappoint sb’s hopes/expectations/plans to prevent something from happening that someone hoped for or expected:
The Berlin settlement of 1878 disappointed Russian hopes in the Balkans.