warning bell
A "warning bell" can be a literal device or a metaphorical indicator signaling potential danger or a need for caution.
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Definition
B2Safety
(general)A device that produces a sound to alert people to potential danger.
Example
- The warning bell rang, signaling the start of the fire drill.
B2Metaphor
(figurative)An indication or sign that something problematic or concerning may occur.
Example
- Her sudden change in behavior was a warning bell for her friends.
Similar
Terms that have similar or relatively close meanings to "warning bell":
alarm bellwarning signdanger signalred flaghealth warningred alertbell ringerwarning trackring a bellfalse alarmfire alarmbad signdeath knellcode yellowwarning shotfire alarm hornwake-up callring someone's belldistress signalbell ropeyellow flagbell buttonhell's bellswatch out