A Bhajan is a devotional song with a religious or spiritual theme, commonly found in Indian religions and expressed in many language of the subcontinent. The term "bhajanam" (Sanskrit: भजनम्) signifies reverence and is derived from the root word "bhaj" (Sanskrit: भज्), meaning to revere, as exemplified in phrases like 'Bhaja Govindam' (Revere Govinda). Additionally, the term "bhajana" is associated with the concept of sharing.

The term 'bhajan' is also commonly used to denote a group event featuring one or more lead singers, accompanied by music, and sometimes incorporating dance. Typically, bhajans involve percussion instruments such as tabla, dholak and handheld small cymbals (kartals) are often used to maintain the beat. Bhajans can be performed in various settings, including temples, homes, open spaces under a tree, near a riverbank, or at historically significant locations.

Bhajans do not follow a prescribed form or set rules; they are usually lyrical and rooted in melodic ragas. This genre of music and arts originated during the Bhakti movement and is present in various traditions of Hinduism and Jainism. In Hinduism, Vaishnavism particularly embraces the practice of bhajans.

Typical subjects in bhajans include ideas from scriptures, legendary epics, the teachings of saints, and expressions of loving devotion to a deity.

Bhajans are often composed anonymously and shared as part of a musical and artistic tradition. Different genres such as Nirguni, Gorakhanathi, Vallabhapanthi, Ashtachhap, Madhura-bhakti, and the traditional South Indian form Sampradya Bhajan each have their own repertoire and singing methods.