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Noun: fourth dimension  forth di'men-shun
  1. The fourth coordinate that is required (along with three spatial dimensions) to specify a physical event
    - time

Type of: dimension

Encyclopedia: Fourth dimension

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four-stroke internal-combustion engine
four-tailed bandage
fourteen
fourteenth
Fourteenth Amendment
fourth
Fourth Council of Constantinople
fourth cranial nerve
Fourth Crusade
fourth deck
fourth dimension
Fourth Earl of Chesterfield
Fourth Earl of Orford
fourth estate
Fourth Lateran Council
Fourth of July
fourth part
fourth power
fourth stomach
fourth ventricle
fourthly