the GNU version of the Collaborative International Dictionary of English
n. One who describes the universe; one skilled in cosmology.
The Century Dictionary and Cyclopedia
n. One who investigates the problems of cosmology; one versed in cosmology.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an astronomer who studies the evolution and space-time relations of the universe
Word Usage
"At 16, Lucy was eating her breakfast in the family kitchen, listening quietly as Elaine talked to another nurse, who wanted to know if the cosmologist was her only client."