truth 
(trth)
(trth)n. pl. truths(trthz, trths)
1.
a. Conformity to fact or actuality: Does this story have any truth?
b. Reality; actuality: In truth, he was not qualified for the job.
c. The reality of a situation: The truth is, she respects your work.
2.
a. A statement proven to be or accepted as true: truths about nature.
b. Such statements considered as a group: researchers in pursuit of truth.
3. Sincerity; integrity: the truth of his intentions.
4. Fidelity to an original or standard: the truth of the copy.
5.
a. Theology & Philosophy That which is considered to be the ultimate ground of reality.
b. Logic The positive (true) truth-value.
[Middle English trewthe, loyalty, from Old English trēowth; see deru- in the Appendix of Indo-European roots.]
Synonyms: truth, veracity, verity, verisimilitude
These nouns refer to the quality of being in accord with fact or reality. Truth is a comprehensive term that in all of its nuances implies accuracy and honesty: “We seek the truth, and will endure the consequences” (Charles Seymour).
Veracity is adherence to the truth: “Veracity is the heart of morality” (Thomas H. Huxley).
Verity often applies to an enduring or repeatedly demonstrated truth: “beliefs that were accepted as eternal verities” (James Harvey Robinson).
Verisimilitude is the quality of having the appearance of truth or reality: “merely corroborative detail, intended to give artistic verisimilitude to an otherwise bald and unconvincing narrative” (W.S. Gilbert).
These nouns refer to the quality of being in accord with fact or reality. Truth is a comprehensive term that in all of its nuances implies accuracy and honesty: “We seek the truth, and will endure the consequences” (Charles Seymour).
Veracity is adherence to the truth: “Veracity is the heart of morality” (Thomas H. Huxley).
Verity often applies to an enduring or repeatedly demonstrated truth: “beliefs that were accepted as eternal verities” (James Harvey Robinson).
Verisimilitude is the quality of having the appearance of truth or reality: “merely corroborative detail, intended to give artistic verisimilitude to an otherwise bald and unconvincing narrative” (W.S. Gilbert).