a light bulb goes off/on (in someone's head)

idiom

Definition of a light bulb goes off/on (in someone's head)

chiefly US, informal
used to say that a person suddenly understands something or has a great idea
  • After thinking about the problem for several days, a light bulb went off in her head, and she knew how to solve it.

Word by Word Definitions

light play
  1. : something that makes vision possible

  2. : the sensation aroused by stimulation of the visual receptors

  3. : electromagnetic radiation of any wavelength that travels in a vacuum with a speed of 299,792,458 meters (about 186,000 miles) per second

  1. : having light : bright

  2. : not dark, intense, or swarthy in color or coloring : pale

  3. : medium in saturation and high in lightness

  1. : to become light : brighten

  2. : to take fire

  3. : to ignite something (such as a cigarette)

  1. : having little weight : not heavy

  2. : designed to carry a comparatively small load

  3. : having relatively little weight in proportion to bulk

  1. : lightly

  2. : with little baggage

  1. : dismount

  2. : settle, alight

  3. : to fall unexpectedly

bulb play
  1. : a resting stage of a plant (such as the lily, onion, hyacinth, or tulip) that is usually formed underground and consists of a short stem base bearing one or more buds enclosed in overlapping membranous or fleshy leaves

  2. : a fleshy structure (such as a tuber or corm) resembling a bulb in appearance

  3. : a plant having or developing from a bulb

goes
  1. : present tense third-person singular of go

  2. : plural of go

off play
  1. : from a place or position

  2. : at a distance in space or time

  3. : from a course : aside

  1. used as a function word to indicate physical separation or distance from a position of rest, attachment, or union

  2. : to seaward of

  3. : from the possession or charge of

  1. : seaward

  2. : right

  3. : more removed or distant

  1. : to go away : depart

  2. : kill, murder

  1. : competition : contest

someone play
  1. : some person : somebody


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