truth (n.)

Old English triewð (West Saxon), treowð (Mercian) "faith, faithfulness, fidelity, loyalty; veracity, quality of being true; pledge, covenant," from Germanic abstract noun *treuwitho, from Proto-Germanic treuwaz "having or characterized by good faith," from PIE *drew-o-, a suffixed form of the root *deru- "be firm, solid, steadfast." With Germanic abstract noun suffix *-itho (see -th (2)).

Sense of "something that is true" is first recorded mid-14c. Meaning "accuracy, correctness" is from 1560s. English and most other IE languages do not have a primary verb for "speak the truth," as a contrast to lie (v.). Truth squad in U.S. political sense first attested in the 1952 U.S. presidential election campaign.

At midweek the Republican campaign was bolstered by an innovation—the "truth squad" ..., a team of senators who trailed whistle-stopping Harry Truman to field what they denounced as his wild pitches. [Life magazine, Oct. 13, 1952]

Let [Truth] and Falsehood grapple; who ever knew Truth put to the worse, in a free and open encounter. [Milton, "Areopagitica," 1644]

updated on August 17, 2020

Definitions of truth from WordNet
truth (n.)
a fact that has been verified;
at last he knew the truth
the truth is that he didn't want to do it
truth (n.)
conformity to reality or actuality;
the situation brought home to us the blunt truth of the military threat
he was famous for the truth of his portraits
they debated the truth of the proposition
Synonyms: the true / verity / trueness
truth (n.)
a true statement;
he thought of answering with the truth but he knew they wouldn't believe it
he told the truth
Synonyms: true statement
truth (n.)
the quality of being near to the true value;
the lawyer questioned the truth of my account
Synonyms: accuracy
Truth (n.)
United States abolitionist and feminist who was freed from slavery and became a leading advocate of the abolition of slavery and for the rights of women (1797-1883);
Synonyms: Sojourner Truth
Etymologies are not definitions. From, not affiliated with etymonline.