say it: FUHNGK-shuh-ning
functioning is a noun and adjective meaning "process or manner of functioning or operating". It carries 2 recorded senses.
process or manner of functioning or operating
“the power of its engine determines its operation”
“the plane's operation in high winds”
“they compared the cooking performance of each oven”
“the jet's performance conformed to high standards”
performing or able to perform its regular function
“a functioning flashlight”
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 functioning 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.