Main Difference
The main difference between Cornet and Flugelhorn is that the Cornet is a musical instrument and Flugelhorn is a brass instrument
Cornet
The cornet (, US: ) is a brass instrument similar to the trumpet but distinguished from it by its conical bore, more compact shape, and mellower tone quality. The most common cornet is a transposing instrument in B♭, though there is also a soprano cornet in E♭ and a cornet in C. All are unrelated to the renaissance and early baroque cornett.
Flugelhorn
The flugelhorn (—also spelled fluegelhorn, flugel horn, or Flügelhorn—from German meaning wing horn or flank horn, German pronunciation: [ˈflyːɡl̩hɔʁn]) is a brass instrument that is usually pitched in B♭ but occasionally found in C. It resembles a trumpet, and the tube has the same length but a wider, conical bore. A type of valved bugle, the flugelhorn was developed in Germany from a traditional English valveless bugle, with the first version sold by Heinrich Stölzel in Berlin in 1828. The valved bugle provided Adolphe Sax (creator of the saxophone family) with the inspiration for his B♭ soprano (contralto) saxhorns, on which the modern-day flugelhorn is modeled.
Cornet (noun)
A musical instrument of the brass family, slightly smaller than a trumpet, usually in the musical key of B-flat.
“cornet-à-piston|cornet-à-pistons”
Cornet (noun)
A troop of cavalry; so called from its being accompanied by a cornet player.
Cornet (noun)
A kind of organ stop.
Cornet (noun)
The white headdress worn by the Sisters of Charity.
Cornet (noun)
The standard flown by a cavalry troop.
Cornet (noun)
The fifth commissioned officer in a cavalry troop, who carried the colours (equivalent to the ensign in infantry).
Flugelhorn (noun)
A brass instrument resembling a cornet but with a wider, conical bore, and usually with three valves, in the same B-flat pitch as many trumpets and cornets but with a more deeply conical mouthpiece than those. A bugle with valves.
Cornet (noun)
a brass instrument resembling a trumpet but shorter and wider.
Cornet (noun)
a compound organ stop with a powerful treble sound.
Cornet (noun)
a cone-shaped wafer filled with ice cream.
Cornet (noun)
the fifth grade of commissioned officer in a cavalry troop, who carried the colours. It is still used in some British cavalry regiments for officers of the rank of second lieutenant.
Cornet Illustrations
