O meaning

ō
The 15th letter of the modern English alphabet.
noun
16
3
The 15th in a series.
noun
13
7
Used before the name of or a pronoun referring to a person or thing being formally addressed.
interjection
12
5
Outstanding.
abbreviation
8
0
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.
noun
8
7
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Office telephone number.
abbreviation
3
3
(baseball) Out.
abbreviation
1
0
Outside.
abbreviation
1
0
(sports) Overtime.
abbreviation
1
0
Ocean.
abbreviation
1
0
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(latin) Octarius (pint)
abbreviation
0
0
Octavo.
abbreviation
0
0
Ohio.
abbreviation
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0
Used to form an informal, abbreviated, or slang word or variant.

Ammo.

suffix
0
0
Used as a connective to join word elements.

Acidophilic.

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The fifteenth letter of the English alphabet: from the Greek omega and omicron, both borrowed from the Phoenician.
noun
0
0
Any of the speech sounds that this letter represents, as, in English, the vowel (ō) of boat, (ä) of hot, or (ô) of wrong.
noun
0
0
A type or impression for o or O.
noun
0
0
The fifteenth in a sequence or group.
noun
0
0
An object shaped like O.
noun
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Fifteenth in a sequence or group.
adjective
0
0
Shaped like O; circular or oval in shape.
adjective
0
0
Octavo.
abbreviation
0
0
Old.
abbreviation
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0
Only.
abbreviation
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(popularly) The figure zero; nought.
noun
0
0
A blood type.
noun
0
0
Used in direct address.

O Lord!

interjection
0
0
Used to express surprise, wonder, fear, pain, etc.
interjection
0
0
Used at the end of a line in some ballads.
interjection
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0
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An instance of this exclamation.
noun
0
0
Ocean.
abbreviation
0
0
October.
abbreviation
0
0
Ohio.
abbreviation
0
0
(physics) Ohm(s)
abbreviation
0
0
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(linguis.) Old.

OFr.

abbreviation
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0
Ontario.
abbreviation
0
0
(baseball) Out(s)
abbreviation
0
0
(pharmacy) Pint.
abbreviation
0
0
Oxygen.
symbol
0
0
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Will-o'-the-wisp.

preposition
0
0
affix
0
0
Forming slangy, intensive counterparts of adjectives, nouns, and interjections.

Cheapo, freako.

affix
0
0
Forming slang nouns from adjectives.

Weirdo, sicko.

affix
0
0
Forming compound words.

Sadomasochism, meritocracy.

affix
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Descendant of.

O'Reilly.

affix
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0
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.
noun
0
0
Ohm.The ASCII symbol for ohm.The preferred symbol is , but it doesn't print easily with some software programs.
0
0
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.
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The fifteenth letter of the English alphabet, called o and written in the Latin script.
letter
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The ordinal number fifteenth, derived from this letter of the English alphabet, called o and written in the Latin script.
numeral
0
0
The name of the Latin-script letter O/o.
noun
0
0
A zero (used in reading out numbers).

It is currently two-o-five in the afternoon (2:05 PM).

The first American settlement was in Jamestown in sixteen-o-seven (1607).

noun
0
0
(archaic, always capitalized) The English vocative particle, used before a pronoun or the name of a person or persons to mark direct address.
interjection
0
0
Alternative form of oh.
interjection
0
0
(IRC) Operator.
abbreviation
0
0
abbreviation
0
0
abbreviation
0
0
Emoticon representing a shocked expression.
symbol
0
0

O'Reilly.

prefix
0
0
The molecular formula for oxygen.
symbol
0
0
The molecular formula for ozone.
symbol
0
0
Alternative form of \o/.
.
0
0
.
0
0
(computing) The ASCII control character shift in in caret notation.
symbol
0
0
A goodbye emoticon — the ‘o’ representing a head and the ‘/’ representing an arm waving goodbye.
symbol
0
0
The definition of o is the fifteenth letter of the English alphabet.

An example of o is the first letter in the name "Obama."

noun
0
1
Any of the speech sounds represented by the letter o.
noun
0
1
Something shaped like the letter O.
noun
0
1
A zero.
noun
0
1
Used to express surprise or strong emotion.
interjection
0
1
Of.

Lots o' luck; top o' the morning.

preposition
0
1
Of o or O.
adjective
0
1

Origin of o

  • clipped < words ending in -o (e.g. hippo, steno, gringo)

    From Webster's New World College Dictionary, 5th Edition

  • Ir ō, descendant

    From Webster's New World College Dictionary, 5th Edition

  • Middle English from Old French from Latin from Greek thematic vowel of nouns and adjectives used in combination

    From American Heritage Dictionary of the English Language, 5th Edition

  • Middle English o, a shortening of of of

    From American Heritage Dictionary of the English Language, 5th Edition

  • Perhaps from oh and from shortenings such as hippo

    From American Heritage Dictionary of the English Language, 5th Edition

  • The bars represent arms and the letter o represents the head.

    From Wiktionary

  • = (“eyes”) + O (“wide-open mouth”); compare :-o

    From Wiktionary

  • \ + o + /

    From Wiktionary