sine die

/ˈsʌɪ.ni ˈdaɪ.iː/

//ˈsʌɪ.ni ˈdaɪ.iː// adv

"sine-die" is a 7-letter English headword indexed on PlainSpell.

The verdict

“sine die” is uncommon English (outside the top frequency list), classed as an adverb. The kind of spelling people second-guess.

Unranked
below top-frequency English
8
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Without specifying a date (for a future event); indefinitely.

Corpus desk

Index EN-sine-die · sine die · English

sine die · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "S" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for sine die
PropertyValue
Headwordsine die
LanguageEnglish
Part of speechAdverb
IPA/ˈsʌɪ.ni ˈdaɪ.iː/
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “sine die” in English

sine dieranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

sine die is uncommon English outside the top frequency list, classed as anadverb, transcribed /ˈsʌɪ.ni ˈdaɪ.iː/. Rarity is why readers land here mid-draft. Gloss: "Without specifying a date (for a future event); indefinitely.".

No generated misspelling entries exist for sine die in our index, since its letter sequence doesn't invite the usual edit-distance slips. This entry stands alone in our confusable dataset, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: Unadapted borrowing from Latin sine diē (literally “without a day”). The correct English form is sine die, spelled S-I-N-E- -D-I-E.

Definition

  1. 1
    Without specifying a date (for a future event); indefinitely.

Recorded use

Wiktionary examples

These source excerpts show how sine die appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Years ago […] he might have retrieved his position; but he had done what most people will do in such cases—put off the evil day sine die, and gone on increasing his enormous list of debts.
  2. In anticipation of Dr Hassiem's release the inquest of Mr Ngubene's death, originally scheduled for 13 April, was postponed sine die.

Etymology

Unadapted borrowing from Latin sine diē (literally “without a day”).

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "sine die"?
"sine die" is spelled S-I-N-E- -D-I-E. The IPA pronunciation is /ˈsʌɪ.ni ˈdaɪ.iː/.
What does "sine die" mean?
As an adverb, "sine die" means: Without specifying a date (for a future event); indefinitely.
How do you pronounce "sine die"?
The IPA (International Phonetic Alphabet) transcription for "sine die" is /ˈsʌɪ.ni ˈdaɪ.iː/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "sine die"?
Unadapted borrowing from Latin sine diē (literally “without a day”). See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list