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lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed); "subterranean motives for murder"; "looked too closely for an ulterior purpose in all knowledge"- Bertrand Russell
implied though not directly expressed; inherent in the nature of something; "an implicit agreement not to raise the subject"; "there was implicit criticism in his voice"; "anger was implicit in the argument"; "the oak is implicit in the acorn"