O

Etymology
From the letter, from the  letter , derived from the  letter , from the  hieroglyph.

Letter

 * 1) The fifteenth letter of the basic modern Latin alphabet.

Symbol

 * 1)  success
 * 2)  big O: a class of functions asymptotically bounded from above by a specific function, up to a constant factor
 * 3)  orthogonal group
 * 4)  A wildcard for a rounded vowel or a back vowel
 * synonyms: U
 * 1)  A wildcard for a rounded vowel or a back vowel
 * synonyms: U

Noun

 * 1) Something shaped like the letter O.
 * 2)  A blood type that lacks A or B antigens and may only receive transfusions of similar type O blood, but may donate to all (neglecting Rh factor). Synonym: universal donor.
 * 1)  A blood type that lacks A or B antigens and may only receive transfusions of similar type O blood, but may donate to all (neglecting Rh factor). Synonym: universal donor.

Etymology 2
From, , from , from and 🇨🇬. Featured prominently in William Tyndale's 1525 translation of the New Testament.

Particle

 * O Death! O Death! Won't you spare me over till another year? - part of the refrain from the American folk song "A Conversation with Death".
 * 1) * c. 1810-1820?,, Notes on Macbeth
 * O! the affecting beauty of the death of Cawdor, and the presentimental speech of the king:
 * 1) * c. 1810-1820?,, Notes on Macbeth
 * O! the affecting beauty of the death of Cawdor, and the presentimental speech of the king:

Usage notes

 * The word O is typically written in upper case in modern usage.
 * O is often used in translations from languages which have the vocative case.
 * Although it is not strictly archaic, the particle is sometimes used archaizingly. It conveys a formal or reverential tone.

Etymology 3
Abbreviation.

Derived terms

 * aO 'about'

Noun

 * 1)  Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc.
 * 2)  The number of overs bowled.
 * 3)  Orgasm.
 * 4)  Opium.
 * 1)  Opium.
 * 1)  Opium.
 * 1)  Opium.
 * 1)  Opium.
 * 1)  Opium.
 * 1)  Opium.

Adjective

 * 1)   film classification of the National Legion of Decency

Etymology 4
or. .

Etymology 5
From  romanization: O⁴.

Proper noun

 * 1)  (Ancient Chinese Kingdom)
 * 1)  (Ancient Chinese Kingdom)

Etymology 6
From or.

Adjective

 * 1)  With sugar and no condensed milk added.

Letter

 * 1) The fifteenth letter in the Afar alphabet.

Noun

 * 1) O

Etymology

 * is from in most closed syllables, in some dialects also in open syllables.
 * is from in most closed syllables.
 * is from ; from before certain consonants; in eastern Moselle Franconian from.
 * is from in Ripuarian and northern Moselle Franconian; from  in Ripuarian and northwestern Moselle Franconian; from  in southern Moselle Franconian; in some Moselle Franconian dialects from  in open syllables.

Usage notes

 * In the Dutch-based spelling, short closed is represented by, long open  by.


 * In the German-based spelling, long o is doubled to oo when the German cognate word has oo as well. Long o may or may not be doubled in the following cases:
 * when it is followed by two or more consonants: ;
 * when the German cognate has two vowel letters: ;
 * when the German cognate has a consonant lost or not present in Central Franconian: ;
 * when the German cognate has a short vowel:.
 * In the Dutch-based spelling, long o is always doubled in closed syllables, always written simple in open syllables.

Etymology 2
From.

Adjective

 * 1)  in a relationship

Usage notes
A number may be placed after to indicate the number of relationships a person has had, including the current one.

Etymology 3
Initialism of.

Noun

 * 1)  orientation camp

Usage notes

 * The pronunciation above are only used while referring to letters in Pinyin. They are not used in other context (such as English).

Letter

 * 1) The fifteenth letter of the Dutch alphabet.

Proper noun

 * 1) * 1904, certificate of marriage number 9 of 1904 of Sint-Pieters-Leeuw (reproduced in: )
 * "nl"
 * "nl"

- Op 10/02/1904 om 11:00 uur zijn voor ons Zacharias De Ro, schepen gehuwd: Theophilius O enerzijds en anderzijds Maria Elisabetha Troucheau

Adverb

 * 1) ; east

Usage notes
Used in linguistic descriptions in Finnish. For example, a Finnish grammar could use to refer to the suffix  (in e.g. ) or  (in e.g. ).

Noun

 * 1) ; west

Letter

 * 1) the fifteenth letter of the French alphabet

Noun

 * 1) oeste, occidente (west)

Letter

 * 1) The fifteenth letter of the German alphabet.

Noun

 * 1) ; east

Noun

 * 1) ; west

Etymology
From.

Symbol

 * 1) true.

Etymology
Proposed in 1908 as part of the new Latvian spelling by the scientific commission headed by K. Mīlenbahs, which was accepted and began to be taught in schools in 1909. Prior to that, Latvian had been written in German Fraktur, and sporadically in Cyrillic.

Letter




Usage notes
In native Latvian words (and in some older borrowings), o represents the sound of IPA [uə̯] (e.g., [uə̯tɾs]). In more recent borrowings, it represents the original sound of the word, i.e. [o] or [oː] (e.g., [oːpeɾa]).

Etymology 2
From earlier, from Old Limburgish , from , from.

Noun

 * 1)  eye
 * 2)  germ, bud; eye (potato)
 * 3)  dot, pip, spot
 * 4)  eye

Etymology 3
Nominalized form of.

Noun

 * 1) old woman

Usage notes
When followed by the letter, a diphthong representing the phoneme is formed, as in.

Letter

 * 1)  It is preceded by  and followed by . Its traditional name is  or .

Usage notes

 * The twenty-sixth letter of the Somali alphabet, which follows Arabic abjad order. It is preceded by I and followed by U.

Letter

 * 1) the 16th letter of the Spanish alphabet

Noun

 * 1) ; west

Etymology
. Each pronunciation has a different source:
 * Filipino alphabet pronunciation is influenced by.
 * Abakada alphabet pronunciation is influenced by the Baybayin character.
 * Abecedario pronunciation is from.

Letter

 * 1)  It is preceded by  and followed by .

Mutation

 * O cannot be mutated but, being a vowel, does take h-prothesis, for example with the word :