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當且僅當

简 当且仅当 · 繁 當且僅當
Mandarin · pinyin dāng qiě jǐn dāng

Meanings

  1. if and only if
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Characters in this entry

當
dāng · bear, accept, undertake; just
且
qiě · moreover, also (post-subject); about to, will soon (pre-verb)
僅
Look up this written character
当
dāng · bear, accept, undertake; just
仅
jǐn · only, merely, solely, just
Written characters and their own readings; the entry’s pronunciation is shown above.

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Entries containing 當且僅當 ↗Words written with 當 ↗Words written with 且 ↗Words written with 僅 ↗Words written with 当 ↗Words written with 仅 ↗

Mandarin tones

1–3–3–1 · dang1 qie3 jin3 dang1

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Compare dictionary sources Wiktionary · 1 sense · 1 Cantonese reading

Rime Cantonese 粵拼

dong1 ce2 gan2 dong1

Cantonese word readings for 當且僅當. This lexicon supplies readings, not definitions.

CanCLID contributors · CC BY 4.0 · source & license · Data pack

dong1 ce2 gan2 dong1

Pleco · CC BY-SA 3.0 · Word reading; meanings not aligned.

Wiktionary English definitions · Chinese section

Independent source senses for this spelling, with usage labels retained. Not matched to the pronunciation above.

conj

  1. (Mainland China, mathematics, logic) if and only if

Source page · dump 2026-09-02 · Contributors & history

Wiktionary contributors · CC BY-SA 4.0 · source & license · Data pack