1. A ferocious form of Śiva, akin to Kālī, revered in Tantrism especially by the Kāpālikas and in Kashmir Śaivism. By meditating on this terrible form of the deity, the adept (sādhaka) eventually sees through the ferocity and apprehends the transcendent beyond form. He is accompanied by his śakti Bhairavī who is likewise terrible.
2. The name/title of one who seeks to enter a Tantric sect.
"Bhairava." The Concise Oxford Dictionary of World Religions. . Encyclopedia.com. (August 19, 2018). http://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/bhairava
"Bhairava." The Concise Oxford Dictionary of World Religions. . Retrieved August 19, 2018 from Encyclopedia.com: http://www.encyclopedia.com/religion/dictionaries-thesauruses-pictures-and-press-releases/bhairava