Definitions
adjective
not belonging to that in which it is contained; introduced from an outside source
“water free of extraneous matter”
adjective
coming from the outside
“extraneous light in the camera spoiled the photograph”
adjective
not pertinent to the matter under consideration
“an issue extraneous to the debate”
adjective
not essential
“the ballet struck me as extraneous and somewhat out of keeping with the rest of the play”
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