1、keep down的意思是：v.控制；镇压；缩减。2、keep down的英英释义是Verb:place a limit on the number ofput down by force or intimidation;"The government quashes any attempt of an uprising""China keeps down her dissidents very efficiently""The rich landowners subjugated the peasants working the land"manage not to throw up。3、keep down的读音是英[kiːpdaʊn]；美[kiːpdaʊn]。