Caliber (noun)

1. The diameter of the bore of a firearm or the internal diameter of a pipe or tube.
2. The quality or standard of something, especially a person's abilities or intellectual capacity.
3. The type of ammunition used in a firearm.

Origin:

From french calibre, "measure of size, caliber", from arabic qalib, "mold, pattern".

Examples:

1. The gun's caliber was so large that it could take down an elephant with a single shot.
2. She was known for her high caliber, always delivering exceptional work.
3. The gun store only carried ammunition for firearms of specific calibers.
4. His speaking skills were of the highest caliber, captivating the audience every time.
5. The caliber of the wines in the cellar was a testament to the owner's discerning taste.