a piece of cloth with special colours or symbols that represents a country, group, or idea
They raised the flag at sunrise during the ceremony.
A gentle wind made the colourful flag wave above the school.
a yellow cloth thrown by an American-football official to show that a rule has been broken
The referee threw a yellow flag after the late hit.
Fans groaned when the second flag of the drive stopped the play.
a special marker or setting in a computer program that shows a particular state or option
Set the error flag to true if something goes wrong.
The app uses a small green flag to show that you are online.
to mark or draw attention to something so it can be found or dealt with later
Please flag any emails that need my urgent attention.
The auditor flagged three suspicious payments.
to become weak, tired, or less enthusiastic
The runner began to flag in the final kilometre.
After hours of study, her concentration flagged.
