An oblong metal ring with a spring clip, used in mountaineering to attach a running rope to a piton or similar device.(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 "carabiner" in a sentence
"They also feature a bottle opener and built-in carabiner clip."
" Pull the end of the rope that goes over the branch until the first carabiner is near the branch."
"A carabiner is the mountaineer's clip; a carabineer is a soldier wielding a carbine."