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

(Northern England) Carrion; any filth. / (Northumbria) Sweetmeats. / (Wearside) A sweet, treat or candy.

(colloquial) ketamine

(Scotland) matted wool

A member of a people of Krasnoyarsk Krai in Central Siberia, Russia.

The Yeniseian language of this people.

plural of ket

(Yorkshire) Manure or farm muck spread on farm land.

plural of Ket

(physics) The product of two vectors (and optionally an operator), in Hilbert space, where the left vector is a bra and the right is a ket. Symbolised by ⟨...|...〉 (bra and ket only) or ⟨...|...|...〉 (bra, operator, ket).