Synonyms of 'outer'
1 externalDictionary, outside, outward
Peel away the outer skin of the onion.
2 surfaceDictionary, external, outward
Our preoccupation with appearance goes much deeper than the outer image.
3 outlyingDictionary, remote, distant
the outer suburbs of the city
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Distant means very far away.
the war in that distant land
Thesaurus for outer from the Collins English Thesaurus
The outer parts of something are the parts which contain or enclose the other parts, and which are furthest from the centre.