o
Portuguese, article
o is spelled O (one letter) and appears 29,512 times per million words in written Portuguese, the 3rd most frequent Portuguese word form (wordfreq, 2021 data). O is a Portuguese masculine article meaning “the (the definite grammatical article that shows that the noun phrase that immediately follows it is definitely identifiable...)” (English Wiktionary, September 2026). With a capital, O is a different word: “The fifteenth letter of the Portuguese alphabet, written in the Latin…”. With an accent, ó is a different word: “The name of the Latin script letter O/o”. With a tilde, õ is a different word: “Used to indicate nasalization, with a similar pronunciation to the…”. The Portuguese Wiktionary (Wikcionário) defines it as “partícula gramatical usada antes de substantivos ou palavras substantivadas; por geral indica uma coisa em…”.
What does o mean in English?
letter
- 1
masculineThe fifteenth letter of the Portuguese alphabet, called ó and written in the Latin script.
article
- 1
masculinethe (the definite grammatical article that shows that the noun phrase that immediately follows it is definitely identifiable...)
Estou lendo o livro que Maria avaliou.
- 2
masculinethe (the definite grammatical article that shows that the noun phrase that immediately follows it is definitely identifiable...)
Deus salve a Rainha!
- 3
masculinethe (the definite grammatical article that shows that the noun phrase that immediately follows it is definitely identifiable...)
Me leva pro aeroporto.
- 4
masculinesometimes after lhe, especially when referring to a body part, a family member, or a pet.
O pai está viajando.
- 5
colloquialmasculine(precedes a familiar nickname or other term of address)
Como tá a Bia hoje?
- 6
masculinethe (the definite grammatical article that shows that the noun phrase that immediately follows it is definitely identifiable...)
pior a emenda que o soneto
- 7
masculinethe (the definite grammatical article that shows that the noun phrase that immediately follows it is definitely identifiable...)
Esse é o hospital ideal para se realizar uma cirurgia cardíaca.
- 8
masculinethe (the definite grammatical article that shows that the noun phrase that immediately follows it is definitely identifiable...)
Me chamo Ivete, mas não sou a Ivete.
pronoun
- 1
masculinehim, it (as a direct object; as an indirect object, see lhe; after prepositions, see ele)
suffix
- 1
masculineforms masculine singular nouns and adjectives
suffix
- 1
a suffix indicating the first-person singular present indicative of -ar
- 2
a suffix indicating the first-person singular present indicative of -er
- 3
a suffix indicating the first-person singular present indicative of -ir
letter
- 1
masculineThe fifteenth letter of the Portuguese alphabet, written in the Latin script.
letter
- 1
masculinethe letter o with an acute accent
noun
- 1
masculineThe name of the Latin script letter O/o.
interjection
- 1
o; hey (vocative particle)
interjection
- 1
colloquiallook!
interfix
- 1
-o-
letter
- 1
masculineUsed to indicate nasalization, with a similar pronunciation to the letter sequence om.
letter
- 1
masculinethe letter O with a tilde
noun
- 1
masculineThe name of the Latin script letter O/o.
interjection
- 1
Brazilinformalhey (used to draw someone’s attention)
letter
- 1
masculinethe letter O with a circumflex accent
letter
- 1
masculinethe letter O with an acute accent
interfix
- 1
alternative spelling of -o- (“-o-”) (used when the vowel is stressed open)
Source: English Wiktionary, Portuguese section, dump of September 2, 2026 (CC BY-SA 4.0).
How Portuguese dictionaries define it
article: 1. partícula gramatical usada antes de substantivos ou palavras substantivadas; por geral indica uma coisa em particular
pronoun: 1. pronome demonstrativo masculino/neutro 2. pronome pessoal da terceira pessoa do singular do caso oblíquo objetivo direto
noun: 1. letra que representa (por semelhança com zero) grupo sanguíneo que não possui aglutinógenos nas hemácias 2. símbolo do oxigênio 3. abreviação de Oeste
interjection: 1. expressa que o exclamador quer ter a atenção doutrem voltada para si 2. expressa que o emissor considera afirmativamente de modo intenso 3. expressa que não 4. expressa apaziguação, tranquilização e estímulo de que continue a caminhada
interjection: 1. expressa chamamento ou invocação 2. expressa o desejo que o interlocutor olhe para o ponto indicado 3. expressa deslumbre, impressionamento
noun: 1. nome da décima quinta letra do alfabeto latino representada por o, O 2. algo ou alguém muito maçante, difícil de aturar (usado na expressão o ó, também grafada uó)
suffix: 1. indicador de gênero masculino em substantivos e adjetivos
suffix: 1. indicador de primeira pessoa do singular do presente do indicativo
contraction: 1. contração arcaica da preposição a com o artigo definido o; ao 2. contração arcaica da preposição a com o pronome demonstrativo o; ao
The definition in the Portuguese Wiktionary (Wikcionário), in Portuguese.
Source: Portuguese Wiktionary (Wikcionário), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of o
- O uppercase
- a feminine
- os masculine plural
- as feminine plural
- o lowercase
- Ó uppercase
- ós plural
- oh alternative
- Õ uppercase
- õ lowercase
- ôs plural
- ow alternative Internet
- ô lowercase
- ó lowercase
Source: English Wiktionary and Portuguese Wiktionary (Wikcionário) (dumps of September 2, 2026 and September 1, 2026).
English words that translate to o
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is o in Portuguese?
o appears 29,512 times per million words in written Portuguese.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).