1. having no shadow; not casting a shadow
2. without shade or darkness; brightly lit

Examples

• The shadowless room was lit by fluorescent lights from every angle.
• At noon, the sun created an almost shadowless landscape.
• The photographer used multiple lights to achieve a shadowless portrait.
• The vampire in the story was shadowless, casting no reflection.
• The operating room was designed to be shadowless for precise surgery.
• Under the overcast sky, everything appeared shadowless and flat.