1. the quality of being honest and telling the truth
2. the quality of being accurate or factual

Examples

• Her truthfulness made her a trusted friend.
• The witness was praised for his truthfulness during the trial.
• We value truthfulness in our employees above all else.
• The documentary’s truthfulness was questioned by critics.
• His reputation for truthfulness helped him win the election.
• The teacher emphasized the importance of truthfulness in academic work.
• She doubted the truthfulness of his excuse for being late.