1. sleeping peacefully
2. inactive or dormant
Usage: figurative

1. present participle of slumber; sleeping lightly or peacefully

Examples

• The slumbering child looked peaceful in her crib.
• He found his cat slumbering in a patch of sunlight.
• The slumbering volcano had been quiet for decades.
• Her slumbering talents were finally discovered by the coach.
• The baby was slumbering soundly through the night.
• The slumbering giant of industry began to stir.
• She spent the afternoon slumbering under the oak tree.