[ik-strey-nee-uh s] /ɪkˈstreɪ ni əs/

introduced or coming from without; not belonging or proper to a thing; external; foreign:
extraneous substances in our water.
not pertinent; irrelevant:
an extraneous remark; extraneous decoration.
not essential
not pertinent or applicable; irrelevant
coming from without; of external origin
not belonging; unrelated to that to which it is added or in which it is contained

1630s, from Latin extraneus “external, strange,” from extra “outside of” (see extra-).


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