Rashtriya Swayamsevak Sangh abbreviated as
RSS (Rāṣṭrīya Svayamsēvaka Saṅgha;
IPA: ,
lit. "National Volunteer Organisation" or National Patriotic Organisation) is a
right-wing volunteer,
Hindu nationalist,
non-governmental organisation. It is the world's largest voluntary non-governmental organisation. RSS states that its ideology is based on the principle of selfless service to
India.