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expanding universe: Meaning and Definition of
expand'ing u'niverse
Pronunciation: [key]
— Astron. Astron.
- a representation of the universe, based on the observed redshifts of distant galaxies, in which the galaxies are assumed to be receding from each other at a speed proportional to their separation as a result of the expansion of the universe. Cf. Hubble's constant, cosmological redshift.
