WordWeb Online

1. Affected or marked by low spirits
   "is dejected but trying to look cheerful"

1. Lower someone's spirits; make downhearted
   "The news dejected her";
   - depress, cast down, get down, dismay, dispirit, demoralize, demoralise [Brit]

See also: amort [archaic], blue [informal], chapfallen, chopfallen, crestfallen, deflated, depressed, dispirited, distressed, down, down in the mouth, downcast, downhearted, dysphoric, gloomy, glum, grim, lonely, lonesome, low, low-spirited, unhappy

Type of: discourage, frustrate

Antonym: elated