Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
a random
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a random" is correct and usable in written English.
It can be used when referring to something that is chosen or occurring without a specific pattern or purpose. Example: "I decided to pick a random book from the shelf to read during my break."
✓ Grammatically correct
News & Media
Wiki
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
59 human-written examples
"It's a random wandering.
News & Media
It's a random survey".
News & Media
It's not a random offer.
News & Media
It was a random choice.
News & Media
Here is a random sampling.
News & Media
It is a random thing.
News & Media
"It's just a random number".
News & Media
A random sample?
News & Media
A random decision.
News & Media
A random man.
News & Media
A random person.
News & Media
Expert writing Tips
Best practice
In technical contexts (like programming or statistics), ensure that the surrounding nouns (e.g., variable, sample) match the precision of the term.
Common error
Avoid using "a random" in highly formal academic papers when you actually mean "an arbitrary". While 'random' has a specific mathematical definition (equal probability), 'arbitrary' is often more accurate for describing human decisions made without specific criteria.
Source & Trust
78%
Authority and reliability
4.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a random" functions as a modifier within a noun phrase, consisting of an indefinite article and an attributive adjective. According to Ludwig AI, it serves to qualify the following noun as being selected or occurring without a specific plan or bias.
Frequent in
Wiki
44%
News & Media
40%
Science
10%
Less common in
Formal & Business
4%
Reference
1%
Social Media
1%
Ludwig's WRAP-UP
In conclusion, "a random" is a versatile and grammatically correct phrase used to denote a lack of pattern or deliberate purpose. Ludwig AI data shows that it is prevalent across diverse domains, from high-brow journalism in The New Yorker to practical step-by-step instructions on WikiHow. While it is perfectly acceptable in most writing, authors should be mindful of the distinction between statistical randomness and human-driven "arbitrary" decisions in formal contexts. Whether you are describing "a random" event, choice or number, the phrase remains a foundational element of the English language for expressing unpredictability.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
an arbitrary
emphasizes a choice based on individual whim rather than a systematic reason
a chance
focuses more on the element of luck or lack of design
a stochastic
shifts to a formal or mathematical register used in scientific modeling
an accidental
suggests a lack of intention or an unintentional occurrence
a fortuitous
adds a connotation of positive outcome or lucky coincidence
a haphazard
implies a lack of organization or care in the process
a non-specific
removes the focus from the 'randomness' to the lack of a particular target
an incidental
suggests something that occurs as a minor consequence of something else
a stray
often used for physical objects or thoughts that occur outside of a planned sequence
a capricious
implies a choice made via unpredictable changes in mood or behavior
FAQs
How do I use "a random" in a sentence?
You can use it to describe anything chosen without a plan, such as "I picked "a random book" from the library shelf" or "It was just "a random thought" that crossed my mind".
What can I say instead of "a random"?
Depending on your needs, you can use phrases like ""an arbitrary"", "a stochastic" for scientific contexts, or "a haphazard" if the process was messy.
Is it "a random" or "an random"?
The correct form is "a random" because 'random' starts with a consonant sound. Use 'an' only before vowel sounds, such as in "an unpredictable" event.
What is the difference between "a random" and "an arbitrary"?
"a random" implies a lack of pattern or equal probability (often mathematical), while ""an arbitrary"" usually describes a decision made by a person based on whim rather than necessity.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
78%
Authority and reliability
4.9/5
Expert rating
Real-world application tested