ostro

[ˈost̪ɾo]

/[ˈost̪ɾo]/ noun

The verdict

“ostro” is uncommon Spanish (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency Spanish
5
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Ostra de gran tamaño.

Corpus desk

Index ES-ostro · ostro · Spanish

ostro · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 5 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "O" thin
  • PHOTO-UNK Peer pending

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 ostro
PropertyValue
Headwordostro
LanguageSpanish
Part of speechNoun
IPA[ˈost̪ɾo]
Letters5
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Cola larga: rango de “ostro” en español

ostrono entra en el top 100.000 del español: zona de términos técnicos, arcaicos o escasos, el terreno típico de la doble comprobación.

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

Rare enough to double-check

ostro is uncommon Spanish outside the top frequency list, classed as anoun, transcribed [ˈost̪ɾo]. Rarity is why readers land here mid-draft. Gloss: "Ostra de gran tamaño.".

ostro doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable Spanish rules. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.

No explicit etymology string is stored for this entry, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct Spanish form is ostro, spelled O-S-T-R-O.

Definition

  1. 1
    Ostra de gran tamaño.

Synonyms

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 "ostro"?
"ostro" is spelled O-S-T-R-O. The IPA pronunciation is [ˈost̪ɾo].
What does "ostro" mean?
As a noun, "ostro" means: Ostra de gran tamaño.
How do you pronounce "ostro"?
The IPA (International Phonetic Alphabet) transcription for "ostro" is [ˈost̪ɾo]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "ostro" come from?
"ostro" is a Spanish word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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