say it: pree-VEN-shuhn
prevention is a noun meaning "the act of preventing". It is pronounced /pɹiˈvɛnʃən/ — pree-VEN-shuhn. It carries one recorded sense.
the act of preventing
“there was no bar against leaving”
“money was allocated to study the cause and prevention of influenza”
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 prevention 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.