[1] : The Collaborative International Dictionary of English v.0.48

vap \vap\ va^p, n. see vapid.
   that which is vapid, insipid, or lifeless; especially, the
   lifeless part of liquor or wine. obs.
   1913 webster

         in vain it is to wash a goblet, if you mean to put into
         it nothing but the dead lees and vap of wine. --jer.
                                                  taylor.
   1913 webster
see also:
vapid 

[2] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

vap
     value added process netware, nlm, predecessor
     
     

Vap >> V Words
Vap, definition of term: Vap
vap_pag1.html