1. causing or inviting sleep; drowsy or sleepy
Usage: literary
2. peaceful and quiet in a way that suggests sleep
Usage: literary

Examples

• The slumberous afternoon heat made everyone feel drowsy.
• She spoke in a slumberous voice that was barely above a whisper.
• The slumberous village seemed untouched by the modern world.
• A slumberous mood settled over the garden in the late evening.
• The slumberous rhythm of the waves lulled him to sleep.
• The professor’s slumberous lecture put half the class to sleep.