Viper/ˈvaɪpər/ Definition 1 of 2Pro Tip 1/3Nature Hazard Vipers are dangerous snakes, often mentioned when discussing outdoor safety. Always wear boots in the desert to protect against viper bites. Pro Tip 2/3Zoological Term The term 'viper' is used in biology to classify certain snake species. The Gaboon viper has the longest fangs of any snake. Pro Tip 3/3Metaphorical Fear The viper can symbolize hidden dangers, often used in stories or movies. The viper lurking in the grass represents unforeseen threats.