Definition of cobweb noun from the Oxford Advanced Learner's Dictionary

 

cobweb

 noun
noun
BrE BrE//ˈkɒbweb//
 
; NAmE NAmE//ˈkɑːbweb//
 
 
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  • a fine net of threads made by a spider to catch insects; a single thread of this net (usually used when it is old and covered with dirt) Thick cobwebs hung in the dusty corners. He brushed a cobweb out of his hair. see also spider’s web, web
  • Word Origin Middle English coppeweb, copweb, from obsolete coppe ‘spider’ + web.Idioms
    blow/clear the cobwebs away
     
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    to help somebody start something in a fresh, lively state of mind A brisk walk should blow the cobwebs away.
    See the Oxford Advanced American Dictionary entry: cobweb