A more thorough explanation:

Definition: Necation (ni-kay-shən), n. [from Latin necare "to kill"] Historical term for the act of killing.

• The necation of Julius Caesar by Brutus and his co-conspirators is a well-known event in ancient Roman history.
• In medieval times, necation was often used as a form of punishment for crimes such as treason or heresy.
• The practice of necation was eventually abolished in most countries due to its inhumane nature.

These examples illustrate how necation refers to the act of intentionally causing someone's death. The first example shows how it was used in a historical context to describe a specific event, while the second example highlights how it was used as a form of punishment. The third example demonstrates how necation was eventually recognized as a cruel and unjust practice and was abolished in many societies.