1. causing or capable of causing death
2. extremely harmful or destructive
Usage: often used figuratively

Examples

• The snake’s bite contains a lethal dose of venom.
• Carbon monoxide is a lethal gas that has no smell.
• The accident was caused by a lethal combination of speed and rain.
• His lethal jump shot helped win the championship.
• The critic wrote a lethal review of the new play.
• Lethal weapons are strictly regulated by law.
• The disease can be lethal if left untreated.