Noun

(-)

A quality of endurance and courage.

* 360 BCE , , Book VIII.

In the succeeding generation rulers will be appointed who have lost the guardian power of testing the metal of your different races, which, like Hesiod's, are of gold and silver and brass and iron.

* 1599 , '', act iv, scene 8 (''First Folio ed.)

By this Day and this Light, the fellow ha's mettell enough in his belly.

* 2001 , Harry J. Alexandrowicz, Testing your Mettle: Tough Problems and Real-world Solutions for Middle and High School Teachers , page xiii

Please read on and discover the issues in education that test the mettle of those who experience this world every day.

Good temperament and character.

* 1868 , , Bleak House

The arrival of this unexpected heir soon taking wind in the court, still makes good for the Sol, and keeps the court upon its mettle .

(obsolete) Metal; a metallic substance.

* 1837 , Robert Burton, The Anatomy of Melancholy , page 78

They have neither gold nor silver of their own, wine nor oyl, or scarce any corn growing in those United Provinces, little or no wood, tin, lead, iron, silk, wooll, any stuff almost, or mettle ; and yet Hungary, Transilvania, that brag of their mines, fertile England, cannot compare with them.

Noun

(en noun)

A strong will, determination.

The state of being resolute.

A statement of intent, a vow

The act of discerning detail.

* {{quote-magazine, year=2013, month=July-August, author= Fenella Saunders, magazine=(American Scientist)

, title= Tiny Lenses See the Big Picture , passage=The single-imaging optic of the mammalian eye offers some distinct visual advantages. Such lenses can take in photons from a wide range of angles, increasing light sensitivity. They also have high spatial resolution , resolving incoming images in minute detail.}}

(computing) The degree of fineness with which an image can be recorded or produced, often expressed as the number of pixels per unit of length (typically an inch).

(computing) The number of pixels in an image being stored or displayed.

(computing) The process of determining the meaning of a symbol or address; lookup.

name resolution

(math) The act or process of solving; solution.

the resolution of an equation

A formal statement adopted by an assembly.

(sciences) The separation of the constituent parts (of a spectrum etc).

(sciences) The degree of fineness of such a separation.

(music) Progression from dissonance to consonance; a chord to which such progression is made.

The moment in which the conflict ends and the outcome of the action is clear.