The Takbīr (تَكْبِير), also written Tekbir or Takbeer, is the term for the Arabic phrase Allāhu Akbar (الله أكبر), usually translated as "God is great", "God is [the] greatest", or "God is greater". It is a common Islamic Arabic expression, used in various contexts by Muslims; in formal prayer, in the call for prayer (adhān), as an informal expression of faith, in times of distress, or to express resolute determination.