One who explores or studies caves, especially as a sport or recreational pursuit.(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.
Use "caver" in a sentence
"What little character development that exists -- one caver is blamed for another's death years before -- is trivial and serves no real purpose to the plot."
"EE: So, Jim - isn't it true your hobby as a caver is really a cover up for the work you're doing for N. S.A.'s search for Atlantis?"
"He may not be a "caver," but he soon became a "cavee.""