intransitive. Of light: to issue in a beam or shaft. Also (rarely) of steam: to issue. Obsolete.

intransitive. Chiefly with preposition or adverb. Of light: to issue or travel in rays.

Of light, etc.: To be emitted in rays, to dart. Also with adverbs, as out, up. Of a glance: To dart.

intransitive. Of light, heat, or energy of any kind: to issue or travel as rays. Also figurative.

intransitive. Of light: to form into pencil beams. Also transitive: to form (light) into pencil beams. Chiefly poetic.