The Collaborative International Dictionary of English v.0.48:

Philistine \Phi*lis"tine\, a.
   1. Of or pertaining to the Philistines.
      [1913 Webster]

   2. Uncultured; commonplace.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Philistine \Phi*lis"tine\, n. [L. Philistinus, Heb.
   Phlishth[imac], pl. Phlishth[imac]m.]
   1. A native or an inhabitant of ancient Philistia, a coast
      region of southern Palestine.
      [1913 Webster]

   2. A bailiff. [Cant, Eng.] [Obs.] --Swift.
      [1913 Webster]

   3. A person deficient in liberal culture and refinement; one
      without appreciation of the nobler aspirations and
      sentiments of humanity; one whose scope is limited to
      selfish and material interests. [Recent] --M. Arnold.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Philistine
    adj 1: of or relating to ancient Philistia or its culture or its
           people
    2: smug and ignorant and indifferent or hostile to artistic and
       cultural values [syn: anti-intellectual, philistine]
    n 1: a person who is uninterested in intellectual pursuits [syn:
         philistine, anti-intellectual, lowbrow]
    2: a member of an Aegean people who settled ancient Philistia
       around the 12th century BC

The Devil's Dictionary (1881-1906):

PHILISTINE, n.  One whose mind is the creature of its environment,
following the fashion in thought, feeling and sentiment.  He is
sometimes learned, frequently prosperous, commonly clean and always
solemn.