Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Origin: cop 'spider' (14-15 centuries) (from Old English atorcoppe 'spider') + web

cobweb

 noun
     
Related topics: Insects
cob‧web [countable]
1HBI a net of sticky threads made by a spider to catch insects, that is inside a building and has not been removed
2

blow/clear the cobwebs away

to do something, especially go outside, in order to help yourself to think more clearly and feel better:
A brisk walk will soon blow the cobwebs away.
—cobwebbed adjective
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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