Word.ws English Dictionary

qubit

/ˈkjuːbɪt/US/ˈkjubɪt/

qubit noun: a quantum bit; the basic unit of quantum information described by a superposition of two states; a quantum bit in a quantum computer capable of being in a state of superposition; A binary qudit.

Noun

qubit (plural qubits)

  1. (quantum computing) A quantum bit; the basic unit of quantum information described by a superposition of two states; a quantum bit in a quantum computer capable of being in a state of superposition; A binary qudit.
    • Quantum computing, on the other hand, is based on quantum bits, or qubits.2006 March 25, NewScientist, page 42/2
    • Each extra qubit in a quantum machine doubles the number of simultaneous operations it can perform.2012 February 25, ‘An uncertain future’, The Economist
    Synonyms:
    quantum bit

Examples of qubit in a sentence

  • Google’s Sycamore computer has all of 53 qubits to its name, as does a new IBM computer, installed online at the company’s Quantum Computation Center in Poughkeepsie, N.Y.2019 October 21, Dennis Overbye, “Quantum Computing Is Coming, Bit by Qubit”, in New York Times:
  • By harnessing that odd behavior, scientists can instead build a quantum bit, or qubit, which stores a combination of 1 and 0.2019 October 23, Cade Metz, “Google Claims a Quantum Breakthrough That Could Change Computing”, in New York Times:

Synonyms of qubit

Forms of qubit

pluralqubits
alternative formqbit

Origin of qubit

Blend of quantum + bit, a play on cubit (“historical unit of length”). Coined by American physicist Benjamin Schumacher in 1995.

Words formed from qubit

Words that rhyme with qubit

Questions about qubit

What does qubit mean?
Qubit means a quantum bit; the basic unit of quantum information described by a superposition of two states; a quantum bit in a quantum computer capable of being in a state of superposition; A binary qudit.
How do you use qubit in a sentence?
Google’s Sycamore computer has all of 53 qubits to its name, as does a new IBM computer, installed online at the company’s Quantum Computation Center in Poughkeepsie, N.Y.
What part of speech is qubit?
Qubit is a noun.
How do you pronounce qubit?
Qubit is pronounced /ˈkjuːbɪt/ (UK).
What is the plural of qubit?
The plural of qubit is qubits.

Words near qubit in the dictionary

  1. Qubec
  2. Qubeck
  3. qubi-
  4. qubibyte
  5. qubibytes
  6. qubit
  7. qubitope
  8. qubitopes
  9. qubits
  10. Qubodiyon
  11. qubyte

Source and license

Adapted from Wiktionary: qubit (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-cubit.wav.

Cite this entry: “qubit.” Word.ws, https://word.ws/qubit. Based on Wiktionary, CC BY-SA 4.0.