signal flag

Thesaurus

Noun

1.

signal flag - a rectangular piece of fabric used as a signalling deviceflagvisual signal - a signal that involves visual communicationpennant - a flag longer than it is wide (and often tapering)code flag, nautical signal flag - one of an international code of flag signals used between shipsred flag - a flag that serves as a warning signal; "we didn't swim at the beach because the red flag was up"