# singleton
## English
### Etymology

From single +‎ -ton, probably following the model of simpleton.

### Pronunciation

* (General American, Received Pronunciation) IPA: /ˈsɪŋ.ɡ(ə)l.tən/
* Audio (US):(file)

### Noun

singleton (plural singletons)
* (playing cards) A playing card that is the only one of its suit in a hand, especially at bridge.
* (playing cards) A hand containing only one card of a certain suit.
* A single object, especially one of a group.
* (computing) A class that may not be instantiated more than once, i.e. that implements the singleton design pattern.
* (mathematics) A set with exactly one element.
* A child or animal that is born singly, not as a twin or other multiple birth.
    singleton preterm birth
** 2015 October 23, “Periconception Maternal Folate Status and Human Embryonic Cerebellum Growth Trajectories: The Rotterdam Predict Study”, in PLOS ONE‎, →DOI:Viable non-malformed singleton pregnancies were selected for cerebellar measurements; transcerebellar diameter, (TCD), left and right cerebellar diameters (LCD, RCD).
* A person without a romantic partner.
** 2022 August 14, “Lessons in love”, in The Sunday People‎:Millennials and Gen Zedders’ approach to romance can teach later-life singletons a thing or two about new relationships, according to dating agent Anna Williamson.
* A person without a dissociative identity.
* (phonetics) A single consonant, as opposed to a geminated consonant.
    singleton sonorants
* (backgammon) Synonym of blot

#### Antonyms

* wedder

#### Derived terms

* nonsingleton
* singleton set

#### Translations
### See also

* multiton

## Dutch
### Pronunciation

* IPA: /ˈsɪŋɡəltɔn/, /ˈsɪŋəltɔn/

### Noun

singleton m (plural singletons, diminutive singletonnetje n)
* a singleton (lone playing card)

### Noun

singleton n (plural singletons, diminutive singletonnetje n)
* a singleton (design pattern, class, set)

## French
### Pronunciation

* Audio:(file)

### Noun

singleton m (plural singletons)
* card games singleton
* mathematics singleton
* computing singleton

### Further reading

* “singleton”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

## Polish
### Etymology

Borrowed from English singleton.

### Pronunciation

* IPA: /siŋˈɡlɛ.tɔn/
* Rhymes: -ɛtɔn
* Syllabification: sin‧gle‧ton

### Noun

singleton m inan
* (object-oriented programming, software engineering) singleton, singleton pattern (creational design pattern that restricts the instantiation of a class to one object)
    Coordinate term: multiton
* (set theory) singleton, unit set, one-point set (set with exactly one element)
    Synonyms: zbiór jednoelementowy, zbiór jednostkowy
* (card games) singleton (playing card that is the only one of its suit in a hand, especially at bridge)
    Synonym: singel

#### Declension
### Further reading

* singleton in Polish dictionaries at PWN

## Portuguese
### Noun

singleton m (plural singletons)
* (computing) singleton (class that may not be instantiated more than once)

## Romanian
### Etymology

Borrowed from English singleton.

### Noun

singleton n (uncountable)
* singleton

#### Declension
### References

* singleton in Academia Română, Micul dicționar academic, ediția a II-a, Bucharest: Univers Enciclopedic, 2010. →ISBN