Definition from Wiktionary, the free dictionary
|Unicode name||TIBETAN SYLLABLE OM|
- An esoteric seed syllable employed throughout dharmic traditions, e.g.: Sanatana Dharma (Hinduism), Sikha Dharma (Sikhism), Jaina Dharma (Jainism) and Buddha Dharma (Buddhism) including Mantrayana, Vajrayana, etc. as well as Hindu Tantra (Tantrism). The seed syllable is also employed in Bon traditions though these are not formally "Dharmic" traditions, they are considered so in modern parlance.