Wordnet 3.0
NOUN (3)
1. 
 a cook who bastes roasting meat with melted fat or gravy; 
2. 
 a sewer who fastens a garment with long loose stitches; 
[syn: baster, tacker]
3.  a tube with a rubber bulb used to take up and release melted fat or gravy in order to moisten roasting meat; 
WordNet (r) 3.0 (2006):
baster
    n 1: a cook who bastes roasting meat with melted fat or gravy
    2: a sewer who fastens a garment with long loose stitches [syn:
       baster, tacker]
    3: a tube with a rubber bulb used to take up and release melted
       fat or gravy in order to moisten roasting meat