The Collaborative International Dictionary of English v.0.48:

Haphtarah \Haph*ta"rah\, n.; pl. -taroth. [Heb.
   hapht[=a]r[=a]h, prop., valedictory, fr. p[=a]tar to depart.]
   One of the lessons from the Nebiim (or Prophets) read in the
   Jewish synagogue on Sabbaths, feast days, fasts, and the
   ninth of Ab, at the end of the service, after the parashoth,
   or lessons from the Law. Such a practice is evidenced in Luke
   iv.17 and Acts xiii.15.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Haphtarah
    n 1: a short selection from the Prophets read on every Sabbath
         in a Jewish synagogue following a reading from the Torah
         [syn: Haftorah, Haftarah, Haphtorah, Haphtarah]