Results for “what is an oxford comma” · retrieved September 22, 2026
The Oxford comma is a punctuation mark placed before the final conjunction in a list of three or more items.
Also known as the serial or Harvard comma, it is placed after the penultimate item in a list of three or more terms, immediately before the coordinating conjunction (such as and or or). While some style guides and regions mandate its use to ensure clarity and prevent ambiguity, others consider it optional or unnecessary, preferring to omit it for simplicity or to save space. Its name originates from its requirement in the Oxford University Press style guide.
Answer details
Placement and Usage
It is used in a series of three or more items, appearing after the second-to-last item and before the word and or or.
Purpose and Clarity
It is often used to clarify the relationship between list items and prevent ambiguity, though it can sometimes create confusion depending on the sentence structure.
Style and Regional Differences
Usage is largely a matter of style; for example, the Chicago Manual of Style recommends it, while the Associated Press Stylebook typically advises against it. It is more common in American English than in British English.
Origin of the Name
The term is associated with the Oxford University Press, which popularized the rule in its 1905 style guide, though the specific term Oxford comma did not appear in print until the 1970s.
Sources 8
About this answerWhat Is the Oxford Comma (or Serial Comma)? | Grammarly
The Oxford (or serial) comma is the final comma in a list of things....The Oxford comma is the one right after pen....The use of the Oxford comma is a matter of style, meaning that some publishing styles stipulate its use while others don’t. It’s not grammatically incorrect to use the Oxford comma or to skip it, but you should be consistent one way or the other. It’s worth noting, however, that the Oxford comma can sometimes help avoid confusion
March 28, 2023
Serial comma - Wikipedia
The serial comma (also referred to as the Oxford comma [1] or Harvard comma) [2] is a comma placed after the penultimate term in a list (just before the conjunction) when writing out three or more terms. [3] [4] [5] For example, a list of three countries might be punctuated with the serial comma as "France, Italy, and Spain" or without it as "France, Italy and Spain". The serial comma can help avoid ambiguity in some situations, but can also crea
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The Oxford Comma - The Blue Book of Grammar and Punctuation
What Is the Oxford Comma?...An Oxford comma is the final comma that can be used or omitted in a series. For example, consider the two following sentences:...The meaning of each sentence is the same, but the second one has an additional comma after “oranges.” That optional comma before the last item in the series is known as the Oxford comma. You may have noticed that, at least in this example, the meaning and clarity of each sentence is the sa
August 9, 2021
What is an Oxford Comma? || Oregon State Guide to Grammar
It goes by many names: the Oxford comma, the Harvard comma, or the final serial comma. And if I had written down that last sentence, I might have used one. Most people know that when you have a list, or series, the convention is to separate each item with a comma. We call those serial commas, and many people have been taught the last one is optional. But that’s not exactly true....The actual rule is that when we have a list of items, we always ne
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Oxford Comma
The Oxford comma—also known as the serial comma, series comma, or Harvard comma—is defined as the comma after the penultimate item in a list of three or more items, before “and” or “or.” Stated in another way, it’s the use of a comma before the conjunction in a list of three or more items....● I went to the store to buy cherries, raisins, and oranges for the fruitcake that I’m making. ● We can get pizza, noodles, or sandwiches for lunch. Backgrou
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Oxford comma, n. meanings, etymology and more | Oxford English Dictionary
Oxford comma, n. meanings, etymology and more | Oxford English Dictionary Oxford comma noun...What does the noun Oxford comma mean? There is one meaning in OED's entry for the noun Oxford comma. See ‘Meaning & use’ for definition, usage, and quotation evidence. See meaning & use...970s...The earliest known use of the noun Oxford comma is in the 1970s....OED's earliest evidence for Oxford comma is from 1978, in the writing of P. Sutcliffe.
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What Is an Oxford Comma? | Proofed's Writing Tips
The Oxford comma, otherwise known as the serial comma, may be one of the most intensely debated punctuation marks in English. Even if you prefer not to use the Oxford comma, learning about its history and the rules (and sometimes even legal cases) surrounding it can be fascinating. In this post, we’ll discuss this somewhat controversial punctuation mark and include practical example sentences to illustrate our main points. Keep reading to learn a
August 30, 2023
Oxford Comma
An Oxford Comma is a comma used before the conjunction (usually "and") in a list of three or more items. For example:...NB: At this point, we're not talking about the Oxford Comma. We're just talking about a clarity issue. The Oxford Comma is a comma used when there are three or more list items....When there are three or more list items, things are complicated because there is no unified position on whether to use a comma with the "and" before th
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