- The definition of peerless is something that is unmatched or is so great that nothing can be compared.
The person who is the best swimmer in the world by far and who has no real competition that comes close is an example of someone who would be described as peerless.
peerless definition by Webster's New World
peerless definition by American Heritage Dictionary
- peerˈless·ly adverb
- peerˈless·ness noun