Ihram refers to the state of consecration that pilgrims enter during the Hajj pilgrimage to Mecca. It involves donning white unstitched clothes, refraining from certain physical activities and maintaining a mindset of spiritual purity and humility before God. Ihram begins at designated areas once intentions are declared, and ends after completing all Hajj rituals, symbolizing the burial and rebirth of one's soul in submission to God.