Vaishnava

Vaishnavism is one of the principal traditions of Hinduism, and is distinguished from other schools by its primary worship of Vishnu (and his associated avatars) as the Supreme God. It is principally monotheistic in its philosophy, whilst also incorporating elements which could be described as being panentheistic. Its beliefs and practices, (known as Bhakti Yoga, or Bhakti) are based largely on Vedic and Puranic texts such as Bhagavad Gita, Isha Upanishad, and the Vishnu and Bhagavata Puranas. The followers of Vaishnavism are referred to as 'Vaishnava(s)', sometimes 'Vaishnavites' in English. According to recent statistics Vaishnavas make up a majority of the total of all followers of Hinduism with the vast majority of these being in India. The Gaudiya Vaishnava branch of the tradition has significantly increased the awareness of Vaishnavism on an international basis over the past fifty years, largely through the activities and geographical expansion of the Hare Krishna movement (ISKCON).
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Noun
1. worshipper of Vishnu
(hypernym) Hindu, Hindoo
(member-holonym) Vaishnavism, Vaisnavism

(n.)
A worshiper of the god Vishnu in any of his incarnations.
  

Vaishnava Vaisnava (Sanskrit) A follower of any sect recognizing and worshiping Vishnu as the sectarian supreme divinity. There are at present four principal Vaishnava sects: the Ramanujas founded by Ramanujacharya; the Madhvas founded by Madhva; the Vallabhas or Vallabhacharyas founded by Vallabhacharya; and a sect in Bengal founded by Chaitanya. Other minor sects are those founded by Ramananda and Kabir. All these Vaishnava sects are of relatively modern origin, though they use at least some of the ancient Hindu writings as their texts.