Lacking interest or excitement; boring. adjective
The lecture was so dull that half the students fell asleep.
She found the movie dull and unengaging.
Lacking brightness, vividness, or sheen. adjective
The sky was a dull gray, hinting at rain.
The once shiny metal had become dull over time.
Not sharp or pointed; blunt. adjective
The knife was too dull to cut through the tomato.
He used a dull pencil to sketch his drawing.
To make or become less intense, bright, or sharp. verb
The pain began to dull after taking the medication.
The noise dulled as the car drove away.
Not lively or spirited; listless. adjective
He felt dull and tired after the long journey.
The party was dull until the music started playing.