Wordnet 3.0
NOUN (1)
1. 
 a narrow strip of material to cover the joint of a door or window to exclude the cold; 
[syn: weather strip, weatherstrip, weather stripping, weatherstripping]
VERB (1)
1.  provide with weatherstripping; 
- Example: "The window must be weatherstripped before the cold weather sets in"
WordNet (r) 3.0 (2006):
weatherstrip
    n 1: a narrow strip of material to cover the joint of a door or
         window to exclude the cold [syn: weather strip,
         weatherstrip, weather stripping, weatherstripping]
    v 1: provide with weatherstripping; "The window must be
         weatherstripped before the cold weather sets in"