| alligator flag |
any of a family of large, broad-leafed, tropical, aquatic plants that usually grow up to six feet tall and have heavy blooms of delicate blue and purple flowers. |
| black flag |
see "Jolly Roger." |
| blue flag |
any of several North American wild irises that bear blue flowers. |
| Flag Day |
June 14, a day commemorating the adoption of the Stars and Stripes as the official flag of the United States. |
| flag of convenience |
the flag belonging to a foreign nation in which a vessel is registered for the financial convenience of the ship's owner. |
| flag of truce |
a white flag displayed to an enemy to indicate a desire to talk together or surrender. |
| flag officer |
a naval or coast guard officer above the rank of captain, who is entitled to have a special flag displayed when he or she is aboard ship. |
| flag stop |
a place where a commercial passenger vehicle stops only if signaled, or stops to let off passengers. |
| flag-waving |
excessive or ostentatious display of or appeal to patriotism. |
| red flag |
(informal) anything that signals trouble or danger ahead. [2 definitions] |
| sweet flag |
a marsh plant having swordlike leaves and aromatic roots, and bearing tiny green flowers. |
| white flag |
a white cloth or flag indicating surrender or truce. |