Definition of "Hessian"

Of, from or relating to Hesse in Germany.  examples

Of or relating to the German mathematician Otto Hesse (1811–1874).  examples

A native or inhabitant of Hesse.  examples

(historical) A mercenary soldier, especially a German one who fought with the British in the American Revolutionary War.

(fashion) Ellipsis of Hessian boot.  examples

(chiefly British) Ellipsis of Hessian cloth/Hessian fabric.: burlap, jute.  examples

(mathematics) Ellipsis of Hessian matrix.  examples