idiom(alsothe world outside)things that arecommoninnormallifebut are notpartofyourexperience:外界,外部世界After 20yearsinprison, he had noideaabout theoutsideworld.在被监禁了20年以后,他对外面的世界一无所知。SMART Vocabulary: related words and phrasesUnknown and unfamiliar
alien
alienly
alienness
anti-foreign
anti-foreigner
moody
murky/uncharted watersidiom
not be insomeone'svocabularyidiom
obscure
obscurely
obscurity
shadowy
TBD
terra incognita
uncharted
uncommon
undefined
unsung
untried
unused
See more results ?(Definition ofthe outside worldfrom theCambridge Advanced Learner's Dictionary & Thesaurus? Cambridge University Press)#https://dictionary.cambridge.org//dictionary/english/outside-world##