Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: extraneus 'foreign, strange', from extra; EXTRA-

extraneous

adjective
     
ex‧tra‧ne‧ous formal
1 not belonging to or directly related to a particular subject or problem [= irrelevant]
extraneous to
Such details are extraneous to the matter in hand.
2 coming from outside:
extraneous noises

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