1. lacking meaning, purpose, or logic; pointless
2. unconscious; having lost consciousness
3. lacking good judgment or common sense; foolish

Examples

• The senseless violence in the movie disturbed many viewers.
• It seems senseless to drive when you could walk there in five minutes.
• The boxer was knocked senseless in the third round.
• She lay senseless on the ground after fainting.
• His senseless spending left him deeply in debt.
• The committee made a senseless decision to cancel the popular program.
• After the accident, he remained senseless for several hours.