1. a gentle song sung to help a baby or child fall asleep

1. to sing a lullaby to someone

Examples

• She sang a soft lullaby to her crying baby.
• The mother’s lullaby helped the child drift off to sleep.
• Rock-a-bye Baby is a famous traditional lullaby.
• He would lullaby his daughter every night before bed.
• The gentle lullaby filled the nursery with peaceful sounds.
• She hummed a lullaby while rocking the infant.
• The music box played a sweet lullaby melody.