The Collaborative International Dictionary of English v.0.48:

Lighter \Light"er\ (l[imac]t"[~e]r), n.
   One who, or that which, lights; as, a lighter of lamps.
   [1913 Webster]

   cigarette lighter A small portable device which produces a
      flame when a button is pushed, carried on the person to
      allow one to light cigarettes conveniently, and taking the
      place of a match. It may have a reservoir of liquid fuel
      conveyed by a wick, or may contain compressed butane as
      the fuel.
      [PJC]

WordNet (r) 3.0 (2006):

cigarette lighter
    n 1: a lighter for cigars or cigarettes [syn: cigar lighter,
         cigarette lighter, pocket lighter]