The letter O.
An example of o is the first letter in the name "Obama."
- the fifteenth letter of the English alphabet: from the Greek omega and omicron, both borrowed from the Phoenician
- any of the speech sounds that this letter represents, as, in English, the vowel (?) of boat, (ä) of hot, or (ô) of wrong
- a type or impression for o or O
- the fifteenth in a sequence or group
- an object shaped like
- of o or O
- fifteenth in a sequence or group
- shaped like ; circular or oval in shape
- popularly the figure zero; nought: in printed matter, zero is usually differentiated from the letter O, as in this dictionary: “O” is the character used for the letter, “0” is the character used for the number
- a blood type
- used in direct address: O Lord!
- used to express surprise, wonder, fear, pain, etc.: now usually oh
- used at the end of a line in some ballads
- Physics ohm(s)
- Linguis. Old: OFr
- Baseball out(s)
Origin of OClassical Latin octariusPharmacy pint
- forming slangy, intensive counterparts of adjectives, nouns, and interjections: cheapo, freako
- forming slang nouns from adjectives: weirdo, sicko
Origin of -oclipped from words ending in -o (e.g. hippo, steno, gringo)
Origin of O'-Irish ?, descendant
nounpl. o's, or O's also os or Os
- The 15th letter of the modern English alphabet.
- Any of the speech sounds represented by the letter o.
- The 15th in a series.
- Something shaped like the letter O.
- O One of the four major blood groups in the ABO system. Individuals with this blood group have neither A nor B antigens on the surface of their red blood cells, and have both anti-A and anti-B antibodies in their blood serum.
- A zero.
brass marker, Bourbon Street
Named for the royal house ruling France when New Orleans was founded in 1718, Bourbon Street runs through the heart of the city's French Quarter.
- Used before the name of or a pronoun referring to a person or thing being formally addressed: “How can I put it to you, O you who prepare to travel with important matters on your mind?” ( Jo Durden-Smith )
- Used to express surprise or strong emotion: “O how I laugh when I think of my vague indefinite riches” ( Henry David Thoreau )
- Sports a. offenseb. offensive
- office telephone number
- Baseball out
- Sports overtime
- Latin octarius (pint)
- also O. octavo
Origin of -oPerhaps from oh 1and from shortenings such as hippo
Origin of -o-Middle English from Old French from Latin from Greek thematic vowel of nouns and adjectives used in combination
Origin of o'Middle English o, a shortening of of ; see of .
(lower case, upper case O)
lower case (upper case O)
= (“eyes”) + O (“wide-open mouth”); compare :-o
- The molecular formula for oxygen.
- The molecular formula for ozone.
- Alternative form of \o/.
- (computing) The ASCII control character shift in in caret notation.
- A goodbye emoticon — the ‘o’ representing a head and the ‘/’ representing an arm waving goodbye.
o - Computer Definition
- Ohm.The ASCII symbol for ohm.The preferred symbol is , but it doesn't print easily with some software programs.
- O+ (O positive).The most common blood type. Give blood, please. Assuming that the technician is skilled and the equipment is properly sterilized, it doesn't take long, it doesn't hurt, and it doesn't make you ill, but it may very well save a life.