Disappointment (noun)

1. A feeling of sadness or dissatisfaction arising from the non-fulfillment of one's hopes or expectations.
2. A feeling of sadness or displeasure caused by the non-fulfillment of one's hopes or expectations.
3. A failure to fulfill one's hopes or expectations.
4. The feeling of sadness or dissatisfaction that comes from something not being as good as you hoped.
5. The feeling of discouragement or dissatisfaction resulting from the failure of your expectations to be realized.

Origin:

Late middle english: from old french desappointement, from desappointer "disappoint" (see disappoint).

Examples:

1. He was filled with disappointment when he didn't get the job.
2. The team's defeat was a disappointment.
3. The concert was a disappointment.
4. She was disappointed when her friend didn't show up.
5. The movie was a disappointment to critics and audiences alike.