Word forms: rays
COBUILD Advanced British English Dictionary1. countable nounRays of light are narrow beams of light. [+ of] ⇒ ...the first rays of light spread over the horizon. ⇒ It can be seen clearly in a ray of sunlight or under a lamp. ⇒ The sun's rays can penetrate water up to 10 feet.2. → see also cosmic rays, gamma rays, X-ray3. countable nounA ray of hope, comfort, or other positive quality is a small amount of it that you welcome because it makes a bad situation seem less bad. [+ of] ⇒ They could provide a ray of hope amid the general business and economic gloom. ⇒ The one ray of sunlight in this depressing history is her meeting and falling in love with Martin.4. countable nounA ray is a fairly large sea fish which has a flat body, eyes on the top of its body, and a long tail.