A school of high caliber; an executive of low caliber.
An example of caliber is being highly qualified for a job for which you are recommended.
An example of caliber is a gun that needs a .45 measured bullet.
Origin of caliber
- French calibre from Italian calibro from Arabic qālib, qālab mold, shoe tree from Greek kālapous shoemaker's last kālon wood pous foot ped- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition