| Main Entry: | beacon |
| Part of Speech: | noun |
| Definition: | light used as signal, guide |
Synonyms: |
alarm, alert, balefire, beam, bonfire, flare, guidepost, heliograph, lamp, lantern, lighthouse, lodestar, pharos, radar, rocket, sign, signal fire, smoke signal, warning signal, watchtower |
| Main Entry: | distress signal |
| Part of Speech: | noun |
| Definition: | internationally recognized signal requesting help |
Synonyms: |
Mayday, SOS, alarm, burglar alarm, call for help, danger signal, fire alarm, flare, mayday, notice to mariners, signal of distress, warning signal |
| Main Entry: | high sign |
| Part of Speech: | noun |
| Definition: | silent signal of warning |
Synonyms: |
alert, signal, the nod, the wink, warning signal |
| Main Entry: | alarum |
| Part of Speech: | noun |
| Definition: | alarm |
Synonyms: |
alert, bell, call to arms, signal, siren, warning, warning signal |