1. lacking brightness, vividness, or sheen
2. lacking interest or excitement; boring
3. not sharp or pointed; blunt

1. to make or become less sharp, bright, or intense

Examples

• The dull gray sky threatened rain.
• The lecture was so dull that half the students fell asleep.
• This knife is too dull to cut the tomatoes properly.
• He gave me a dull look, clearly not understanding the joke.
• The dull thud of footsteps echoed in the hallway.
• Years of use had dulled the blade’s edge.
• The medication dulled his pain but made him drowsy.
• Her eyes were dull with exhaustion.