Either Side vs. Both Sides – Which is Correct?

The phrases “either side” and “both sides” are both grammatically correct in American English, but they convey distinct meanings. “Either side” refers to one of two possible sides, implying a choice or an individual perspective. In contrast, “both sides” refers to two sides collectively, emphasizing inclusion or simultaneity of both perspectives or directions.

Either Side or Both Sides – Which is Correct?

“Either side” and “both sides” are distinct phrases used to describe different scenarios involving two options or entities. The choice between them depends entirely on the intended meaning: whether you mean one of two, or both simultaneously.

You use either side when you are referring to one of two possibilities, or to individual aspects of two separate entities. It implies a choice or an independent consideration of each side. For example, if you say “You can sit on either side of the table,” it means you can sit on one side OR the other, but not necessarily both at once.

You use both sides when you are referring to two options, entities, or perspectives collectively, emphasizing that both are included or considered together. For example, “The fence had flowers on both sides” means flowers were present on the first side AND the second side simultaneously.

The Best Trick to Remember the Difference

To remember the difference, think of the core meaning of “either” versus “both.” “Either” implies “one or the other,” a choice or a singular instance from a pair. “Both” implies “the two together,” an inclusion of everything in a pair. If you can swap it with “one or the other,” use “either side.” If you can swap it with “the two,” use “both sides.”

Word/Phrase	Part of Speech	Meaning	Example
Either side	Determiner + Noun	One of the two sides; each individual side (when two are present)	A guard stood on either side of the entrance.
Both sides	Determiner + Noun	The two sides collectively; encompassing all two sides	The river bank had trees on both sides.

How to Use Either Side

“Either side” is used to refer to one of two options, positions, or directions. It implies a sense of individuality or choice between the two. It can also mean “each of two sides” when those sides are considered separately. This phrase is common in both formal and casual contexts, often used when discussing symmetry, opposition, or distribution.

Example 1: The referee stood between the two boxers, with a coach on either side of each fighter, offering last-minute advice.

Example 2: You can choose a seat on either side of the aisle, depending on your preference for a window view.

Example 3: The negotiation team had strong arguments prepared for either side of the potential agreement.

Etymology of the word Either Side

The phrase “either side” draws its meaning from its components. “Either” comes from Old English ǣgther, a contraction of ǣghwæther, meaning “each of two.” “Side” comes from Old English sīde, referring to a long part or distinct aspect of something. Thus, “either side” literally means “each of two distinct aspects or parts.”

To further refine your understanding of these related terms, consider the specific differences highlighted in Neither vs. Either.

How to Use Both Sides

“Both sides” is used to refer to two options, positions, or directions collectively. It emphasizes the inclusion or involvement of both parts of a pair. This phrase is versatile and appears in various contexts, from describing physical arrangements to discussing perspectives in an argument or negotiation. It conveys a comprehensive view of two distinct entities or viewpoints.

Example 1: The new bridge was designed with pedestrian walkways on both sides for safety and convenience.

Example 2: To understand the conflict fully, it’s crucial to hear arguments from both sides of the debate.

Example 3: The contract requires signatures from representatives on both sides before it can be finalized.

Etymology of the word Both Sides

The phrase “both sides” derives its meaning from the word “both,” which originates from Old Norse báðir and Old English bā, meaning “the two.” “Side” as discussed earlier, refers to a distinct aspect or part. Therefore, “both sides” means “the two distinct aspects or parts together,” emphasizing their collective nature.

Related Concepts

Understanding the broader grammatical concepts behind determiners like “either” and “both” can clarify their specific usage in phrases like “either side” and “both sides.”

• “Either” vs. “Both”: These are determiners that specify quantity or selection from a pair. “Either” (as a determiner) means “one or the other of two,” while “both” means “the two together.” This fundamental distinction dictates how they modify “side.”
• Distributive vs. Collective: “Either” often functions distributively, referring to items in a pair individually (e.g., “either chair” means chair A or chair B). “Both” functions collectively, referring to items in a pair as a unit (e.g., “both chairs” means chair A and chair B together). This grammatical nuance is key to understanding “either side” (each side individually) versus “both sides” (the two sides combined).

Examples from Media and Literature

• “It’s a common mistake for people to think that there’s always a clear winner and loser, but sometimes, the truth lies not on either side, but somewhere in the middle.” – From a political analysis column, June 2026.
• “The ancient river flowed, carving a deep gorge with steep cliffs on both sides, a testament to nature’s enduring power.” – From a travel documentary script, May 2026.
• “He found himself caught between two powerful factions, trying to maintain neutrality while pressure mounted from either side to declare allegiance.” – A historical fiction novel.
• “The artist carefully painted the mural, ensuring the vibrant colors extended equally to both sides of the central archway.” – From an art criticism piece.
• “During the heated debate, the moderator reminded the panelists to respect the opinions presented by both sides of the argument.” – A news report, March 2026.

Practice Exercises

Choose the correct word to complete the sentence.

1. The road was lined with trees on _______ side.
2. You can choose to sit on _______ side of the boat, depending on the sun.
3. The treaty required signatures from _______ sides before it could be ratified.
4. A police officer was stationed on _______ side of the crime scene tape.
5. She tried to understand the perspectives of _______ sides before making a decision.

Answer Key

1. both
2. either
3. both
4. either
5. both

Either Side Synonyms

Synonym	Definition
On one side	Referring to a single, distinct side out of two.
Each side	Referring to every individual side when there are two.
Either end	Referring to one of two possible extremities.

Both Sides Synonyms

Synonym	Definition
All two sides	Encompassing both distinct sides without exception.
From all parties	Referring to the collective input or perspective from both involved groups.
On every part (of two)	Indicating presence or action across the entirety of both components.

Frequently Asked Questions

Question 1: Can “either side” be used for more than two options?
No, “either” is specifically used when referring to a choice or distinction between two options. For more than two, you would typically use “any side” or specify the number, e.g., “any of the three sides.”

Question 2: Is “both sides” always inclusive?
Yes, “both sides” is inherently inclusive. It means that the statement or action applies to, or includes, the two specified sides or entities without exception.

Question 3: How does context influence the choice between “either side” and “both sides”?
Context is crucial. If you’re discussing a choice, an individual instance, or a separate consideration of two parts, “either side” is appropriate. If you’re discussing a collective action, a comprehensive view, or something that applies simultaneously to two parts, “both sides” is the correct choice.

Conclusion

While “either side” and “both sides” are both grammatically sound, their correct usage hinges on a clear understanding of their distinct meanings. “Either side” points to one individual part of a pair, offering a choice or separate consideration. “Both sides” refers to the two parts collectively, emphasizing their combined inclusion. Mastering this distinction enhances clarity and precision in communication. Pro Tip: Always pause to consider if you intend to refer to one of two possibilities or the two possibilities together; this quick check will guide you to the correct phrase, maintaining your professional reputation for linguistic accuracy.