Waheguru (Punjabi: ਵਾਹਿਗੁਰੂ, romanized: vāhigurū) is a word used in Sikhism to refer to God. It is also often uttered as a mantra and is called gurmantra or gurmantar. Gur mantr means "the word of the divine," which supposedly takes one "from darkness to the lightness," causing one's mind to expand.
The word Waheguru is traditionally explained as wahi, which means "wondrous." Guru means "teacher," and together, "wahi" and "Guru" are said to carry the meaning, "The wondrous Lord/teacher who dispels the darkness of ignorance and bestows the light of truth, knowledge, and enlightenment."