early 15c., from Old French dejection "abjection, depravity; casting down" and directly from Latin dejectionem (nominative dejectio), noun of action from past participle stem of dejicere "to cast down" (see deject).
1. There was a slight air of dejection about her.
2. Her face showed her dejection at missing the party.
3. He went away in dejection.
4. In a moment of deep dejection she thought of taking her own life.