DuckCorp Dico

Found one definition

1.                 From en.wiktionary.org:
                   
   
   
                   
                     
   
   ** English
   
   *** Verb
   [en]
   
    1. [en]
   *** Noun
   [~]
   
    1. The act by which something is vented.
    2. * [en]
    3. [en]  The release of unwanted gas directly into the atmosphere .
    4. * [en]
   **** Derived terms
   [en]
   
   **** Related terms
   
    - sealing