Apon vs. Upon: Is ‘Apon’ a Real Word? Meaning, Origin, and Grammar Rules

Quick Summary:

“Upon” is a standard, formal Modern English preposition that means “on” or “immediately after.” “Apon” is an obsolete, archaic spelling of “upon” that was widely used during the Middle English period. While “apon” is no longer accepted in modern writing, learning how “upon” evolved helps you master formal writing, literary phrasing, and precise time expressions.

Introduction: Discovering Older English Words

The English language has evolved significantly over the centuries. As you read historical literature, classic poetry, or older religious texts, you might encounter words that look like modern terms but are spelled in unusual ways.

One common example is the word “apon.”

When English language learners encounter “apon” in older texts, they often wonder: Is “apon” a typo, or is it a real English word? How does it relate to “upon”?

Understanding the relationship between “apon” and “upon” provides a fascinating window into the history of English. It also helps you refine your knowledge of prepositions, improving your formal writing and reading comprehension.

What Is “Apon”? Historical Origins and Middle English

To understand “apon,” we have to travel back to the Middle English period—the stage of the English language spoken roughly between 1150 and 1500 AD (the era of Geoffrey Chaucer’s The Canterbury Tales).

The Historical Evolution of “Apon”

In Middle English, there was no single standardized spelling system like the one we have today. Instead, spelling reflected local spoken pronunciation. Because different regions had distinct accents and dialects, writers spelled words based on how they sounded in their specific areas.

According to Harvard’s History of the English Language Workbook, “apon” reflected an early pronunciation similar to “opone.” The workbook outlines how spellings shifted dramatically from Middle English to Modern English (Present-Day English). Because dialect variation was so common, “apon” and “upon” existed side-by-side as regional spelling variants of the exact same preposition.

To see how much English has changed since the Middle English era, consider this historical example:

“hathel was apon a tre”

In Modern English, this phrase translates to: “A man was on a tree.” As you can see, not only was “upon” spelled “apon,” but words like “hathel” (meaning man or knight) have disappeared from modern speech entirely!

Where Did the Word Originally Come From?

According to the Oxford English Dictionary (OED), the principal historical dictionary of the English language, the origin of “upon” (and its variant “apon”) is linked to the Old Norse term “upp á.” In Old Norse, stress was placed on the “á” sound, which likely influenced the “a” spelling in “apon.”

In short: “Apon” is not a separate word with a different meaning. It is simply an archaic (ancient) spelling of “upon.” In Modern English writing, “apon” is considered obsolete and incorrect.

What Is “Upon”? Meaning and Grammatical Rules

In Modern English, “upon” is an official, fully recognized preposition. If you look closely at the word, you can see that it is a compound word made by combining two basic prepositions: “up” and “on.”

Preposition Structure:

  [ UP ]  +  [ ON ]  --->  [ UPON ]
(Direction)  (Position)     (Formal Preposition)

How to Use “Upon” Grammatically

As a preposition, “upon” must always precede a noun phrase or a gerund (a verb ending in -ing that functions as a noun).

Before Noun Phrases:
- “The castle sits upon the hill.”
- “Pay attention, the enemy is upon us!”
- “She placed the crown upon her head.”
Before Gerunds (-ing verbs):
- “Upon learning the news, she called her family.”
- “Upon entering the building, please sign the guest register.”

Formality and Style

“Upon” is much more formal and literary than simple prepositions like “on” or “at.” It appears frequently in classic literature, academic writing, and storytelling. One famous set expression that has survived through fairy tales and short stories is the classic opening line: “Once upon a time.”

“Upon” vs. “On”: What Is the Difference?

English learners frequently ask: If “upon” means “on,” can I use them interchangeably?

While “upon” and “on” often share the same core meaning, their usage differs in subtle ways regarding tone, time, and fixed expressions.

1. Formality and Rhythm

In many cases, choosing between “on” and “upon” comes down to sentence rhythm, emphasis, and style rather than a change in basic meaning.

“The hat upon her head” (Formal / Literary / Rhythmic)
“The hat on her head” (Casual / Everyday speech)

The Oxford English Dictionary notes that writers often choose “upon” over “on” to improve the poetic rhythm of a sentence or to add dramatic emphasis.

2. Time and Action (Bound vs. Unbound)

The relationship between “on” and “upon” becomes clearer when looking at time-bound actions. Consider these two examples:

Example A: “You should email your new boss on arrival.”
Example B: “Upon arrival at work, he sent an email to his new boss.”

According to grammatical guidelines highlighted in English Corner – Prepositions of Place – The Life and Times of Ben Weinberg, both words relate to position, but they handle time differently:

In Example A, “on” refers to a general rule or routine action that is unbound by a specific single moment.
In Example B, “upon” refers to a specific, completed action bound tightly to a single moment in time.

3. Fixed Expressions Where “On” Cannot Be Used

According to the Cambridge Dictionary, there are specific idiomatic expressions where “upon” cannot be replaced by “on.”

For instance, consider this sentence:

“Another few weeks and spring will be upon us.”

Here, the phrase “be upon [someone/something]” is a fixed idiom meaning that an event, season, or condition is approaching rapidly. Changing this to “spring will be on us” would sound unnatural and incorrect to native speakers.

Comparison Table: “Apon” vs. “Upon” vs. “On”

Word	Status in Modern English	Formality Level	Example Sentence
Apon	Obsolete / Archaic (Middle English)	Historical Only	“Hathel was apon a tre.” (Middle English text)
Upon	Standard & Correct	Formal / Literary	“Upon completing the exam, she left the room.”
On	Standard & Correct	Conversational / Everyday	“Please leave your keys on the table.”

Does “Upon” Mean Before or After?

A common point of confusion for ESL students is determining the time sequence of “upon.” Specifically: Does “upon” mean before an event or after an event?

“Upon” NEVER means before.

When used before a gerund (-ing verb), “upon” means immediately after or as soon as an action happens.

Look at this sentence and its step-by-step interpretation:

Original Sentence: “Upon hearing the news, the men ran out to the streets.”

Meaning: “As soon as the men heard the news, they immediately ran out onto the streets.”

Timeline Sequence:

[ Step 1: Men hear the news ]  --->  [ Step 2: UPON hearing it, they run outside ]
     (Event Happens First)                (Immediate Action Follows)

Using “upon” in this way highlights that the second action was a direct, instant reaction to the first event.

Practice Exercise: Test Your Understanding

Test your knowledge of “upon” by choosing the correct option for each sentence:

Which of the following spellings is considered an archaic Middle English form?

a) Upon

b) Apon

c) On
Choose the correct preposition to complete this formal sentence: “_____ entering the hall, the guests were asked to show their tickets.”

a) Apon

b) Up

c) Upon
In the sentence “Upon hearing the bell, the students stood up,” when did the students stand up?

a) Before the bell rang

b) Immediately after the bell rang

c) Long after the bell rang

(Answers: 1 = b, 2 = c, 3 = b)

Frequently Asked Questions

Is “apon” accepted in Scrabble or modern spell-checkers?

No. Because “apon” is an obsolete Middle English spelling, modern English dictionaries, digital spell-checkers, and official word games like Scrabble do not accept “apon” as a valid word. Always use “upon.”

What is the main difference between “up” and “upon”?

“Up” is primarily a preposition or adverb indicating direction toward a higher position (e.g., “climb up the ladder”). “Upon” is a preposition of place or time that means “on top of” or “immediately after” (e.g., “once upon a time” or “upon arrival”). They are not interchangeable.

Is “upon” too formal for daily speech?

In casual conversation, native speakers usually prefer “on” or “as soon as” because “upon” can sound formal or dramatic. However, “upon” is widely used and expected in business correspondence, formal speeches, academic writing, and literature.

Master English Prepositions and Grammar

Understanding historical variations like “apon vs. upon” clarifies how the English language developed and builds your confidence when reading classic literature or writing formal essays.

To explore more prepositions, historical linguistic breakdowns, and grammar guides, visit our complete English Forward Grammar Hub.

Have a question about prepositions or sentence structure? Post your sentence in the English Forward Language Community Forum to get helpful feedback from certified ESL teachers and native speakers!