n. & v.
n. 1 a single line or narrow beam of light from a small or distant source. 2 a straight line in which radiation travels to a given point. 3 (in pl.) radiation of a specified type (gamma rays; X-rays). 4 a trace or beginning of an enlightening or cheering influence (a ray of hope). 5 a any of a set of radiating lines or parts of things. b any of a set of straight lines passing through one point. 6 the marginal portion of a composite flower, e.g. a daisy. 7 a a radial division of a starfish. b each of a set of bones etc. supporting a fish's fin.
v. 1 intr. (foll. by forth, out) (of light, thought, emotion, etc.) issue in or as if in rays. 2 intr. & tr. radiate. ray gun (esp. in science fiction) a gun causing injury or damage by the emission of rays. rayed adj. rayless adj. raylet n.
[ ME f. OF rai f. L radius: see RADIUS ]