Hyssop/ˈhɪsəp/ Definition 1 of 1Pro Tip 1/3Biblical Reference Hyssop is often associated with religious purification, especially in Christianity and Judaism. The priest used hyssop to sprinkle holy water. Pro Tip 2/3Culinary Use Hyssop is used as a herb in cooking, imparting a minty, slightly bitter taste to dishes. The roasted lamb was seasoned with a pinch of hyssop. Pro Tip 3/3Herbal Remedy Used in herbal medicine, hyssop is said to aid digestion and respiratory health. She brewed a cup of hyssop tea for her cough.