say it: i-va-kyuh-WAY-shuhn
evacuation is a noun meaning "the act of removing the contents of something". It carries 3 recorded senses.
the act of evacuating; leaving a place in an orderly fashion; especially for protection
the bodily process of discharging waste matter
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 evacuation 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.