The Singh Sabha Movement, also known as the Singh Sabha Lehar, was a Sikh movement that began in Punjab in the 1870s in reaction to the proselytising activities of Christians, Hindu reform movements and Muslims. The movement was founded in an era when the Sikh Empire had been dissolved and annexed by the British, the Khalsa had lost its prestige, and mainstream Sikhs were rapidly converting to other religions. The movement's aims were to "propagate the true Sikh religion and restore Sikhism to its pristine glory; to write and distribute historical and religious books of Sikhs; and to propagate Gurmukhi Punjabi through magazines and media." The movement sought to reform Sikhism and bring back into the Sikh fold the apostates who had converted to other religions; as well as to interest the influential British officials in furthering the Sikh community. At the time of its founding, the Singh Sabha policy was to avoid criticism of other religions and political matters.

Sikhs are an ethnoreligious group who adhere to Sikhism, a religion that originated in the late 15th century in the Punjab region of the Indian subcontinent, based on the revelation of Guru Nanak. The term Sikh has its origin in the Sanskrit word śiṣya, meaning 'seeker', 'disciple' or 'student'. According to Article I of Chapter 1 of the Sikh Rehat Maryada, the definition of Sikh is: Any human being who faithfully believes in One Immortal Being Ten Gurus, from Guru Nanak Sahib to Guru Gobind Singh Sahib The Guru Granth Sahib The utterances and teachings of the ten Gurus and The initiation, known as the Amrit Sanchar, bequeathed by the tenth Guru and who does not owe allegiance to any other religion, is a Sikh.