What does “Sikh” mean?

The word Sikh means student. According to the Sikh Rehit Maryada, a Sikh is defined as “any human being who faithfully believes in One Immortal God; ten Gurus, from Guru Nanak to Guru Gobind Singh;  Guru Granth Sahib; the teachings of the ten Gurus and has faith and belief in the Amrit initiation of the tenth Guru; and who does not owe allegiance to any other religion”