say it: uhn-dur-duh-VEL-uhp-muhnt
underdevelopment is a noun meaning "state of inadequate development". It carries 2 recorded senses.
state of inadequate development
“much poverty can be traced to the underdevelopment of industry”
(photography) inadequate processing of film resulting in inadequate contrast
photography
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 underdevelopment 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.