long wave

American  

noun

1. Electricity. an electromagnetic wave over 60 meters in length.

2. Geology. L wave.

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long wave British  

noun

1. 1. a radio wave with a wavelength greater than 1000 metres

   2. ( as modifier )

      a long-wave broadcast

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Other Word Forms

• long-wave
  adjective

Etymology

Origin of long wave

First recorded in 1830–40

Example Sentences

The U.S. is still in the early innings of a long wave upturn in productivity growth—driven in large part by demographic necessity, writes Richard de Chazal, William Blair’s macro analyst.

From Barron's • Jan. 8, 2026

The U.S. is still in the early innings of a long wave upturn in productivity growth—driven in large part by demographic necessity, writes Richard de Chazal, William Blair’s macro analyst.

From Barron's • Jan. 8, 2026

However, the equipment required to hear long wave broadcasts is arguably now obscure.

From BBC • Sep. 4, 2023

The long-term future of the BBC's long wave output is far from certain.

From BBC • Sep. 4, 2023

And then a long wave of warmth crossed the small town.

From "The Martian Chronicles" by Ray Bradbury