mark (an item) for attention or treatment in a specified way.
“greatfully” would be flagged as a misspelling of “gratefully.”
direct (someone) to go in the specified direction by waving a flag or using hand signals.
have him flagged off the course
provide or decorate with a flag or flags.
The day started off with the field committee flagging out the field and preparing dressing rooms and signage.
(of a person) become tired, weaker, or less enthusiastic.
if you begin to flag, there is an excellent café to revive you