The Collaborative International Dictionary of English v.0.48:

beth \beth\ n.
   the 2nd letter of the Hebrew alphabet.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

beth
    n 1: the 2nd letter of the Hebrew alphabet

Easton's 1897 Bible Dictionary:

Beth
   occurs frequently as the appellation for a house, or
   dwelling-place, in such compounds as the words immediately
   following: