Noun

(en noun)

Diameter of the bore of a firearm, typically measured between opposite lands.

The diameter of round or cylindrical body, as of a bullet, a projectile, or a column.

A nominal name for a cartridge type, which may not exactly indicate its true size and may include other measurements such as cartridge length or black powder capacity. Eg 7.62×39 or 38.40.

Unit of measure used to express the length of the bore of a weapon. The number of calibres is determined by dividing the length of the bore of the weapon, from the breech face of the tube to the muzzle, by the diameter of its bore. A gun tube the bore of which is 40 feet (480 inches) long and 12 inches in diameter is said to be 40 calibers long.

(figuratively) Relative size, importance, magnitude.

*

(figuratively) Capacity or compass of mind.

(Burke)

(dated) Degree of importance or station in society.

Noun

(en noun)

The act of achieving or performing; a successful performance; accomplishment

* {{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess) , chapter=1 citation , passage=The original family who had begun to build a palace to rival Nonesuch had died out before they had put up little more than the gateway, so that the actual structure which had come down to posterity retained the secret magic of a promise rather than the overpowering splendour of a great architectural achievement .}}

* {{quote-magazine, year=2012, month=March-April

, author= , title=Well-connected Brains , volume=100, issue=2, page=171 , magazine=(American Scientist) citation , passage=Creating a complete map of the human connectome would therefore be a monumental milestone but not the end of the journey to understanding how our brains work. The achievement will transform neuroscience and serve as the starting point for asking questions we could not otherwise have answered, […].}}

A great or heroic deed or feat; something accomplished by valor or boldness

* [The exploits] of the ancient saints do far surpass the most famous achievements of pagan heroes. - (Isaac Barrow)

* The highest achievements of the human intellect. - (Thomas Babington Macaulay)

(heraldry) An escutcheon or ensign armorial; now generally applied to the funeral shield commonly called hatchment.

(video games) An award for completing a particular task or meeting an objective in a video game.