On the Side vs. At the Side – Which is Correct?

The choice between “on the side” and “at the side” hinges on the specific meaning you wish to convey. While both are grammatically correct, “on the side” typically refers to something additional, secondary, or accompanying. In contrast, “at the side” specifies a physical location, indicating proximity or adjacency. Understanding this distinction is key to precise communication.

On the Side or At the Side – Which is Correct?

Both “on the side” and “at the side” are correct phrases in American English, but they carry distinct meanings and are used in different contexts. The core difference lies in whether you are referring to an addition or accompaniment versus a physical location.

“On the side” is used to describe something that is extra, supplementary, or a secondary aspect. It can refer to:

• An additional job or source of income (e.g., “a side hustle”).
• An accompanying item, often food (e.g., “dressing on the side”).
• A secondary, often unofficial, aspect of something.

“At the side”, on the other hand, is a prepositional phrase that denotes a physical location. It means next to, beside, or alongside something. This phrase is about spatial arrangement and proximity.

The Best Trick to Remember the Difference

To easily remember the distinction, think of the first letter of the preposition:

• “On the side” for Options or Additions: If you’re talking about something extra, supplementary, or a choice (like “sauce on the side” or “a job on the side”), use “on.” Think of it as “Options” or “Additions.”
• “At the side” for Area or Location: If you’re referring to a physical spot next to something (like “standing at the side of the road” or “a table at the side of the room”), use “at.” Think of it as “Area” or “Location.”

Consider the mnemonic: On for Options, At for Area.

Phrase	Part of Speech	Meaning	Example
On the side	Adverbial/Adjectival Phrase	Additionally, as an accompaniment, unofficially, as a secondary activity.	She earns extra income on the side by tutoring.
At the side	Prepositional Phrase	Next to, beside, alongside, in close proximity to a physical object or location.	He parked his car at the side of the road.

How to Use On the Side

“On the side” is a versatile idiom used to express something supplementary, additional, or secondary to a main activity or item. It often implies something that is not the primary focus but is still present or relevant. Its tone is generally neutral to informal, depending on the context.

Example 1: “He works as a teacher, but he also writes novels on the side.” (Secondary activity/income)

Example 2: “I’d like the salad dressing on the side, please.” (Accompanying item, separate)

Example 3: “The detective suspected there was something else going on on the side, hidden from plain view.” (Unofficial/hidden aspect)

Etymology of the phrase On the Side

The phrase “on the side” emerged from the combination of the preposition “on” (indicating addition, attachment, or a state) and the noun “side” (referring to an aspect or part of something). Over time, this combination developed idiomatic meanings related to something being supplementary or distinct from the main focus. The concept of something “on the side” as an extra or accompaniment has been present in English for centuries, evolving to its current common usages.

How to Use At the Side

“At the side” is a prepositional phrase that specifically refers to a physical location, indicating that something is positioned next to, beside, or alongside another object or area. It is used when you want to pinpoint adjacency in space. This phrase is direct and descriptive, suitable for both formal and informal contexts.

Example 1: “She stood patiently at the side of the stage, waiting for her cue.” (Physical location, next to)

Example 2: “There was a small table at the side of the armchair, holding a lamp.” (Physical location, beside)

Example 3: “Please keep your belongings at the side of your seat to allow others to pass.” (Physical proximity)

Etymology of the phrase At the Side

The phrase “at the side” derives from the preposition “at” (denoting a specific point or location) and the noun “side” (referring to a bounding line or surface of an object or area). This construction directly conveys spatial adjacency. The use of “at” for precise location and “side” for a boundary or edge has been fundamental to English grammar for a long time, naturally forming this phrase to describe something being positioned directly next to another.

Related Concepts

Understanding broader grammatical concepts, particularly prepositions and idiomatic expressions, is crucial for distinguishing between “on the side” and “at the side.”

• Prepositions: Prepositions like “on” and “at” are words that show the relationship between a noun or pronoun and other words in a sentence. They indicate location, direction, time, or manner. The specific preposition chosen dramatically alters the meaning, as seen with “on the side” (addition) versus “at the side” (location).
• Idiomatic Expressions: Many phrases in English are idiomatic, meaning their overall meaning cannot be deduced from the individual words. “On the side” functions idiomatically when it refers to a secondary job or income. While “at the side” is more literal, both demonstrate how fixed phrases acquire specific, often nuanced, meanings.

Examples from Media and Literature

• “He had a full-time job at the bank, but he pursued his passion for painting on the side.” (Illustrates “on the side” as a secondary activity)
• “The knight kept his trusty sword always at his side, ready for any challenge.” (Illustrates “at the side” for physical proximity)
• “For dinner, I’ll have the steak, and could I get some extra vegetables on the side?” (Illustrates “on the side” for an accompaniment)
• “A small, ancient village nestled at the side of the towering mountain, hidden from the main road.” (Illustrates “at the side” for physical location)
• “She always carried a notebook and pen on the side, in case inspiration struck unexpectedly.” (Illustrates “on the side” for something additional/ready)

Practice Exercises

Choose the correct word to complete the sentence.

1. The child clung tightly to her mother’s hand as they walked _______ the side of the busy street.
2. He started a small online business _______ the side to supplement his income.
3. Could I have the dressing for my salad _______ the side, please?
4. The old well was located _______ the side of the abandoned farmhouse.
5. She always kept a secret stash of chocolates hidden _______ the side of her bed.

Answer Key

1. at
2. on
3. on
4. at
5. at

On the Side Synonyms

Synonym	Definition
Additionally	In an additional manner; as an extra item or point.
As an accompaniment	Something that goes with or is provided with something else.
Incidentally	By the way; in a casual or secondary manner.
Unofficially	Without official authorization or status; in a private capacity.
Secondarily	In a secondary manner or degree; less importantly.

At the Side Synonyms

Synonym	Definition
Next to	Immediately beside.
Beside	At the side of; next to.
Alongside	Close to the side of; next to.
Adjacent to	Next to or adjoining something else.
By	Near or at the side of.

Frequently Asked Questions

Question 1: Can “on the side” ever refer to a physical location?
No, “on the side” almost exclusively refers to something additional, secondary, or accompanying, not a physical location. For physical location, you would use “at the side” or “on the side of [a surface]” (e.g., “on the side of the box” implies the surface of the box, not next to it).

Question 2: Is there a difference when referring to a person?
Yes, a significant difference. If someone is “at your side,” they are physically next to you, providing support or companionship. If someone is “on your side,” it means they are supporting you, agreeing with you, or are an ally in an argument or conflict, not physically beside you.

Question 3: Is one phrase more formal than the other?
Generally, no. Both phrases are standard English and can be used in both formal and informal contexts. The choice depends entirely on the intended meaning – whether you are describing an addition/accompaniment (“on the side”) or a physical location/proximity (“at the side”).

Conclusion

Distinguishing between “on the side” and “at the side” is a subtle yet important aspect of precise English usage. Remember that “on the side” indicates something supplementary, additional, or secondary, often in an abstract sense, while “at the side” specifies a concrete physical location or proximity. Mastering these nuances ensures clarity and accuracy in your communication. Using them correctly reflects careful attention to detail, a valuable trait in any professional setting.