Meanings
How to pronounce "red flag":
AU
A flag that is red, especially associated with leftist revolutionary ideologies.
A cue, warning, or alert; a sign or signal that something is wrong.
Example: "Improper formatting is a red flag to look for other problems with the data."
Something that will enrage a particular person; a red rag.
A flag formerly used by a railway guard to warn the driver not to start the train.
A signal that the race must be stopped immediately (and possibly restarted).
Example Sentences
1
When I saw his temper tantrum over such a small issue, it was definitely a red flag.
2
Her constant need for attention raised a red flag for me.
3
Finding a hidden folder with suspicious documents on his computer was a major red flag.
4
The company's sudden change in policy without any explanation is a red flag.
5
Seeing him flirt with every woman he meets is a red flag in our relationship.
