Knowledge of things as they are, and as they were, and as they are to come (D&C 93: 24). Truth also refers to light and revelation from heaven.

Truth shall spring out of the earth, Ps. 85: 11 (Moses 7: 62). Ye shall know the truth, and the truth shall make you free, John 8: 32. I am the way, the truth, and the life, John 14: 6. If we say that we have no sin, the truth is not in us, 1 Jn. 1: 8. The guilty take the truth to be hard, 1 Ne. 16: 2. The righteous love the truth, 2 Ne. 9: 40. The Spirit speaketh the truth and lieth not, Jacob 4: 13. Thou art a God of truth and cannot lie, Ether 3: 12. By the power of the Holy Ghost ye may know the truth of all things, Moro. 10: 5. Truth abideth forever and ever, D&C 1: 39. Thou hast been enlightened by the Spirit of truth, D&C 6: 15. The Book of Mormon contains the truth and the word of God, D&C 19: 26. The Comforter was sent forth to teach the truth, D&C 50: 14. He that receiveth the word by the Spirit of truth receiveth it as it is preached by the Spirit of truth, D&C 50: 17-22. Proclaim the truth according to the revelations I have given you, D&C 75: 3-4. Whatsoever is truth is light, D&C 84: 45. The light of Christ is the light of truth, D&C 88: 6-7, 40. My Spirit is truth, D&C 88: 66. Intelligence, or the light of truth, was not created, D&C 93: 29. The glory of God is intelligence, or light and truth, D&C 93: 36. I have commanded you to bring up your children in light and truth, D&C 93: 40. Mine Only Begotten is full of grace and truth, Moses 1: 6.