say it: pruh-LAWNGD
prolonged is an adjective meaning "relatively long in duration; tediously protracted". It carries 2 recorded senses.
relatively long in duration; tediously protracted
“a drawn-out argument”
“an extended discussion”
“a lengthy visit from her mother-in-law”
“a prolonged and bitter struggle”
“protracted negotiations”
drawn out or made longer spatially
“Picasso's elongated Don Quixote”
“lengthened skirts are fashionable this year”
“the extended airport runways can accommodate larger planes”
“a prolonged black line across the page”
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 prolonged 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.