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Ket

//kɛt// name, noun, slang

Definitions

Proper Noun
  1. 1
    A river in Russia, a tributary of the Ob.
  2. 2
    The station code of Kennedy Town in Hong Kong.
  3. 3
    The Yeniseian language of the Ket people.
Noun
  1. 1
    A column vector, in Hilbert space, especially as representing the state of a quantum mechanical system; the complex conjugate transpose of a bra (a row vector); a ket vector. Symbolised by |...〉.

    "A particular ket, say #124;A#92;rangle, might be represented by a particular column vector. Its corresponding bra, #92;langleA#124;, would then be represented by the row vector which is the transpose conjugate of that column vector."

  2. 2
    Carrion; any filth. Northern-England, countable, uncountable
  3. 3
    ketamine colloquial, uncountable
  4. 4
    matted wool Scotland, uncountable
  5. 5
    A member of a people of Krasnoyarsk Krai in Central Siberia, Russia.
Show 3 more definitions
  1. 6
    A native or inhabitant of Brussels. informal
  2. 7
    Sweetmeats. Northumbria, countable, uncountable
  3. 8
    A sweet, treat or candy. Wearside, countable, uncountable

Etymology

Etymology 1

From bra-ket notation invented by Paul Dirac, from bracket.

Etymology 2

Probably of Old Norse origin like kjǫt (“meat”), from Proto-Germanic *ketwą. Compare Icelandic kjöt (“flesh”); akin to Swedish kött, Danish kød, and Norwegian kjøtt. The use of the term ket for "candy" or "sweets" probably derived from its use to describe sweet meats or as a deterrent to children.

Etymology 3

Clipping of ketamine.

Etymology 4

Learned borrowing from Ket кеʼт (keˀt, “human being”), via Russian.

Etymology 5

Learned borrowing from Ket кеʼт (keˀt, “human being”), via Russian.

Etymology 6

Borrowed from Dutch Ket, derived from Dutch ket, Middle Dutch *kitte, Proto-West Germanic *kitte.

See also for "ket"

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