Radiant/ˈreɪdiənt/ Definition 1 of 4Pro Tip 1/2Bright Presence Used to describe someone or something that stands out with brightness or cheerfulness in their surroundings. Her radiant presence lit up the room. Pro Tip 2/2Positive Connotation Conveys a sense of positivity, often associated with happiness, hope, or health. He gave a radiant speech that uplifted everyone's spirits.