red flag, n.
something that irritates or demands immediate action
<noun.act>
red flag
sample sentences
"doing that is like waving a red flag in front of a bull"
semantic pointers
hypernym
the emblem of socialist revolution
<noun.communication>
red flag
semantic pointers
hypernym
a flag that serves as a warning signal
<noun.communication>
red flag
sample sentences
"we didn't swim at the beach because the red flag was up"
semantic pointers
hypernym