light speed

noun

Definition of light speed

: the speed of light
  • Accelerating particles to near light speed, such machines are ideal for smashing them to make exotic states of matter, blast out new particles, or even search for new dimensions of space.
  • —Adrian Cho
also, informal : an extremely fast rate or speed
  • A Netflix spokesman said it was adding titles at light speed while negotiating daily with studios, which have their own strategy for dealing with online distribution.
  • —Josh Quittner

Recent Examples of light speed from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light speed.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of light speed

1914

in the meaning defined above

See Words from the same year
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