Faithful/ˈfeɪθfl/ Definition 1 of 4Pro Tip 1/3Emotional Bonds Use 'faithful' to express deep emotional commitment, beyond just actions. Despite the distance, she remained faithful to her childhood friends. Pro Tip 2/3For People 'Faithful' is often used for loyalty in personal relationships, not just organizations. She has been a faithful companion to me for many years. Pro Tip 3/3Beyond Duty 'Faithful' implies loyalty that goes above the call of duty or obligation. He was faithful to his principles, never yielding to pressure.