frontbencher

from WordNet (r) 3.0 (2006)

frontbencher
    n 1: a member of the House of Commons who is a minister in the
         government or who holds an official position in an
         opposition party

from The Collaborative International Dictionary of English v.0.48

frontbencher \frontbencher\ n.
   a member of the House of Commons of Great Britain who is a
   minister or an ex-minister.
   [WordNet 1.5]

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