Part of speech: noun

The act of extending; extent.

Part of speech: noun

An annex; addition.

Part of speech: noun

The property of occupying space.

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Usage examples "extension":

  1. In more recent history it was the growth, extension, and severity of the police in controlling every activity of man that destroyed both the United States and Russia. - "Eight Keys to Eden", Mark Irvin Clifton.
  2. Lastly, the land re- emerged from the water, and, reaching a level somewhat above its present height, became connected with the continent of Europe, glaciers being formed once more in the higher regions, though the ice probably never regained its former extension. - "The Student's Elements of Geology", Sir Charles Lyell.
  3. Apparently there was a low extension in the rear. - "Ulysses S. Grant", Walter Allen.