Definition of "ket"

(physics) A column vector, in Hilbert space, especially as representing the state of a quantum mechanical system; the complex conjugate of a bra (a row vector); a ket vector. Symbolised by |...〉.  examples

(Northern England) Carrion; any filth.  examples

(Northumbria) Sweetmeats.  examples

(Wearside) A sweet, treat or candy.  examples

(colloquial) ketamine  examples

(Scotland) matted wool  examples