
A
flag, as I'm sure you know, is a piece of cloth used as a symbol of a country or organisation. Such
flags can also be used to send messages or signals. You can
flag up something for attention, or
flag down a taxi.

Flat stones used for paving are sometimes known as
flags. To
flag is to become tired or less enthusiastic.
Flag is also a type of iris.
Is there anything you can think of that I should have
flagged, but didn't? Ah yes, another free to enter writing contest.