what is the meaning of khalifah in islam
Khalifa Khalifa or Khalifah is a name or title which means "successor", "deputy" or "steward". It most commonly refers to the leader of a Caliphate, but is also used as a title among various Islamic religious groups and orders. Khalifa is sometimes also pronounced as "kalifa". There were 4 khalifas after Mohammed died, beginning with Abu Bakr. This was a difficult decision for the people to make, for no one except Mohammed had ever thought with foresight about who would rule after he would die. The Khilaafat (or Caliphate) was then contested and gave rise to the eventual division of the Islamic Umma into two groups, the Sunni and the Shi'a who interpret the word, Khalifa in differently nuanced ways.
Dua In the terminology of Islam, duʿāʾ (Arabic: دُعَاء‎  IPA: [duˈʕæːʔ], plural: ʾadʿiyah أدْعِيَة  [ʔædˈʕijæ]; archaically transliterated Doowa[1]), literally meaning "invocation", is an act of supplication. The term is derived from an Arabic word meaning to 'call out' or to 'summon', and Muslims regard this as a profound act of worship. Muhammad is reported to have said, "Dua is the very essence of worship," while one of God's commands expressed through the Quran is for them to call out to Him: