WordNet sense 1 (the basic unit of money in Great Britain; equal to 100 pence):

pound, British pound, British pound sterling, pound sterling

WordNet sense 2 (something for something; that which a party receives (or is promised) in return for something he does or gives or promises):

quid pro quo

WordNet sense 3 (a wad of something chewable as tobacco):

chew, cud, plug, wad, chaw