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
say hi
Grammar usage guide and real-world examplesUSAGE SUMMARY
"say hi" is a correct and usable phrase in written English.
You can use it in many different contexts as a greeting, such as writing "Say hi to your mom for me!" or "Say hi to your friends!".
✓ Grammatically correct
News & Media
Wiki
Alternative expressions(6)
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
60 human-written examples
"Bobby, say hi".
News & Media
"Say hi to Miranda".
News & Media
Don't say: "Hi @Google+!
News & Media
Do say: "Hi Sweetie!
News & Media
These say, "Hi.
News & Media
"And he'd say, 'Hi, Pop.
News & Media
Come say hi.
News & Media
Say Hi @titoyooo.
News & Media
Say Hi or try flirting.
Wiki
Stop by and say Hi!
News & Media
Say "hi" @noodlemaine!
News & Media
Expert writing Tips
Best practice
Use "say hi" in informal contexts such as casual conversations or friendly notes. For formal situations, consider alternatives like "extend greetings" or "acknowledge".
Common error
Avoid using "say hi" in professional emails or formal reports. Opt for more formal alternatives to maintain a professional tone.
Source & Trust
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "say hi" functions as an imperative, directing someone to perform an action—specifically, to convey a greeting. As Ludwig AI confirms, it's a standard expression. It is mostly used in informal contexts as exemplified by the many examples on Ludwig.
Frequent in
News & Media
49%
Wiki
42%
Science
4%
Less common in
Formal & Business
2%
Encyclopedias
1%
Reference
1%
Ludwig's WRAP-UP
In summary, "say hi" is a common and grammatically sound phrase used to request someone to convey a greeting. As Ludwig AI indicates, it's widely accepted and applicable in various informal contexts. While highly prevalent in news, media and wiki sources, it is generally less appropriate for formal or professional communications. When in doubt, especially in formal settings, consider alternatives such as "extend greetings" for a more polished tone.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
give a hello
A more descriptive way of saying hello.
greet
Single word alternative that is more formal.
wave hello
Specifies a non-verbal form of greeting.
exchange greetings
Highlights the reciprocal nature of greeting.
extend greetings
A more formal and polite way to convey greetings.
acknowledge
A broader term that can include non-verbal greetings.
salute
Implies a formal or respectful greeting, often military.
offer salutations
A very formal and somewhat archaic way to greet someone.
make an appearance
Focuses on the act of showing up and being seen.
reach out
A more general term for initiating contact.
FAQs
How can I use "say hi" in a sentence?
You can use "say hi" in various informal contexts, such as "Remember to say hi to your mother for me" or "Stop by and say hi when you have a chance".
What are some alternatives to "say hi"?
Alternatives include "greet", "acknowledge", or "extend greetings", depending on the formality of the situation.
Is "say hi" appropriate for professional communication?
While "say hi" is perfectly acceptable in casual settings, it's generally too informal for professional communication. Use more formal alternatives like "I hope this message finds you well" or "Best regards".
What's the difference between "say hi" and "greet"?
"Say hi" is an informal way to ask someone to pass on a greeting, while "greet" is a more general and often more formal term for acknowledging someone's presence.
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
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested