Phrase guide

ultima Thule

name · noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

No pronunciation record was provided for this word.

1

name

Meaning 1

Synonym of Arrokoth (“trans-Neptunian object (486958) 2014 MU69”).

Definition source: English Wiktionary via Wiktextract

Usage: informal

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Arrokoth

Antonyms: none provided

2

noun

Meaning 2

A place beyond the borders of the known world.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Highest achievement.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Alternative letter-case form of ultima Thule (“a place beyond the known world; highest achievement”).

Definition source: English Wiktionary via Wiktextract

Usage: alt-of

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

the geographical region believed by ancient geographers to be the northernmost land in the inhabited world

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Thule

Antonyms: none provided

Broader terms: geographical area, geographic area, geographical region, geographic region

History

Etymology

From ultima Thule (“furthest place; a place beyond the known world”). The object was first observed in 2014 and announced later that year as a potential target for NASA's New Horizons probe. In March 2018, after inviting suggestions from the public, NASA selected Ultima Thule as its nickname. Once it was determined that the body was a bilobate contact binary, the New Horizons team began calling the larger lobe Ultima and the smaller Thule.

From Latin ultima Thūlē, nominative feminine singular of ultimus (“furthest”) + Thule, from mediaeval geography; originally from the Ancient Greek Θούλη (Thoúlē), a (possibly mythical) island to the north of Britain.

Capitalization of ultima Thule, from Latin ultima (“final; furthest”) + Thule (“northernmost inhabited island”).

Across languages

Translations

8 source translations are retained for this English entry.

  • French: Ultime Thulé — Translations
  • French: Ultima Thulé — Translations
  • French: Ultima Thule — Translations
  • Italian: Ultima Thule — Translations
  • French: ultima Thulé — Translations
  • French: ultime Thulé — Translations
  • Japanese: 極北 (kyokuhoku) — Translations
  • Spanish: última Tule — Translations