say it: uh-LAHRM
alarm is a noun and verb meaning "fear resulting from the awareness of danger". It carries 6 recorded senses.
fear resulting from the awareness of danger
a device that signals the occurrence of some undesirable event
an automatic signal (usually a sound) warning of danger
a clock that wakes a sleeper at some preset time
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for alarm come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.