1 Definition of SIDS

Meaning of SIDS: The sudden and unexpected death of a healthy child who is younger than one year old, usually during sleep.

The sudden and unexpected death of a healthy child who is younger than one year old, usually during sleep. The cause of SIDS is not known. Also called crib death and sudden infant death syndrome.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.