Worship is an act of religious devotion usually directed towards a deity. The word is derived from the Old English worthscipe, meaning worthiness or worth-ship to give, at its simplest, worth to something, for example, Christian worship

Evelyn Underhill defines worship thus: "The absolute acknowledgment of all that lies beyond us the glory that fills heaven and earth. It is the response that conscious beings make to their Creator, to the Eternal Reality from which they came forth; to God, however they may think of Him or recognize Him, and whether He be realized through religion, through nature, through history, through science, art, or human life and character. Worship asserts the reality of its object and defines its meaning by reference to it

An act of worship may be performed individually, in an informal or formal group, or by a designated leader. Religious worship happens in a wide variety of locations: in purpose-built places of worship, at home or in the open. Many religious traditions place an emphasis upon regular worship at frequent intervals, often daily or weekly. Expressions of worship