Benign/bɪˈnaɪn/ Definition 1 of 3Pro Tip 1/3Emotional Tone Conveys warmth or friendliness, often used to describe a person's demeanor. Her benign approach made everyone feel welcome immediately. Pro Tip 2/3Not Harmful Suggests something is safe and has no negative effects. The benign substance didn't pollute the water at all. Pro Tip 3/3Understated Power Although benign, it can imply subtle influence or authority without aggression. His benign leadership guided the team to success without conflict.