One of the names of the Lord Jesus Christ.

God said unto Moses, I AM THAT I AM, Ex. 3: 14-15. I am the Lord, Ex. 6: 2-3. Before Abraham was, I am, John 8: 56-59. Listen to the voice of Jesus Christ the Great I Am, D&C 29: 1 (D&C 38: 1; 39: 1).