extraneous
adjective
1. not pertinent to the matter under consideration
- an issue extraneous to the debate
Similar word(s): irrelevant, immaterial, impertinent, orthogonal
2. not essential
- the ballet struck me as extraneous and somewhat out of keeping with the rest of the play
Similar word(s): extrinsic
3. not belonging to that in which it is contained; introduced from an outside source
- water free of extraneous matter
Similar word(s): adulterant, adulterating, foreign
4. coming from the outside
- extraneous light in the camera spoiled the photograph
- relying upon an extraneous income
Similar word(s): extrinsic, external, outside
Sentences with extraneous as an adjective:
- to separate gold from extraneous matter
- Extraneous substances were found on my cup of water.