Definition of "astronomer" []

• One who specializes in astronomy. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "One such amateur astronomer is Caroline Moore, who, at age 14, was the youngest person to ever discover a supernova."
• "I can never remember ... you know, the thin astronomer?"
• "A Chinese astronomer from the University of St Andrews has fine-tuned Einstein's groundbreaking theory of gravity, creating a 'simple' theory which could solve a dark mystery that has baffled astrophysicists for three-quarters of a century."