1. (

• extraneous ,
• immaterial ,
• impertinent ,
• orthogonal

) not pertinent to the matter under consideration; "an issue extraneous to the debate"; "the price was immaterial"; "mentioned several impertinent facts before finally coming to the point" ;

2. (

• extraneous ,

) not essential; "the ballet struck me as extraneous and somewhat out of keeping with the rest of the play" ;

3. (

• extraneous ,
• foreign

) not belonging to that in which it is contained; introduced from an outside source; "water free of extraneous matter"; "foreign particles in milk" ;

4. (

• external ,
• extraneous ,
• outside

) coming from the outside; "extraneous light in the camera spoiled the photograph"; "relying upon an extraneous income"; "disdaining outside pressure groups" ;