verb (used without object), ra·di·at·ed, ra·di·at·ing.
- to extend, spread, or move like rays or radii from a center.
- to emit rays, as of light or heat; irradiate.
- to issue or proceed in rays.
- (of persons) to project or glow with cheerfulness, joy, etc.: She simply radiates with good humor.
verb (used with object), ra·di·at·ed, ra·di·at·ing.
- to emit in rays; disseminate, as from a center.
- (of persons) to project (joy, goodwill, etc.).
- radiating from a center.
- having rays extending from a central point or part: a coin showing a radiate head.
- radiating symmetrically.
- Also: eradiate to emit (heat, light, or some other form of radiation) or (of heat, light, etc) to be emitted as radiation
- (intr) (of lines, beams, etc) to spread out from a centre or be arranged in a radial pattern
- (tr) (of a person) to show (happiness, health, etc) to a great degree
adjective (ˈreɪdɪɪt, -ˌeɪt)
- having rays; radiating
- (of a capitulum) consisting of ray florets
- (of animals or their parts) showing radial symmetry
- adorned or decorated with raysa radiate head on a coin
1610s, “spread in all directions from a point,” from Latin radiatus, past participle of radiare “to beam, shine, gleam; make beaming” (see radiation). Meaning “be radiant, give off rays (of light or heat)” is from 1704. Related: Radiated; radiates; radiating.
“having rays, furnished with rays, shining,” 1660s, from Latin radiatus (see radiate (v.)).
- To spread out in all directions from a center.
- To emit or be emitted as radiation.