| Main Entry: | burglar alarm |
| Part of Speech: | noun |
| Definition: | security system |
Synonyms: |
alarm system, warning device |
| 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: | alarm bell |
| Part of Speech: | noun |
| Definition: | warning bell |
Synonyms: |
burglar alarm, danger signal, fire alarm, tocsin |