un·der·de·vel·oped /ˌʌndədɪˈveləpt◂ $ -dər-/ adjectiveadj 1. underdeveloped country/region etc PTa country, area etc that is poor and where there is not much modern industry 欠发达国家/地区等 → developing country 2 DEVELOPnot having grown or developed as much as is usual or necessary 发育不全的 a baby born with underdeveloped kidneys 肾脏先天发育不全的婴儿
—underdevelopment noun [uncountableU]