A more thorough explanation:

Neonaticide is the act of killing a newborn child, usually by the parents or with their consent. It can also refer to the practice of killing newborn children or someone who kills a newborn child. In the past, the word was used to refer to the killing of an unborn child as well.

• A mother who suffocates her newborn baby shortly after giving birth is committing neonaticide.
• A father who throws his newborn child off a bridge is also committing neonaticide.

These examples illustrate the definition of neonaticide as the intentional killing of a newborn child. It is a serious crime that can have severe legal consequences for the perpetrator.