Definitions

1. verb

to walk or move with a slow, slouching gait; to walk with the head hung down, often as a sign of sadness or depression

“He moped through the streets, looking dejected.”

2. noun

a person who is habitually sad or depressed; someone who walks or moves with a slow, slouching gait

“The mope on the corner was begging for change.”

3. verb (informal)

to feel or show disappointment or disillusionment

“I moped about the concert being cancelled.”