The Collaborative International Dictionary of English v.0.48:

Lectern \Lec"tern\ (l[e^]k"t[u^]rn), n. [Written also lecturn
   and lettern.] [LL. lectrinum, fr. lectrum; cf. L. legere,
   lectum, to read.]
   1. A choir desk, or reading desk, in some churches, from
      which the lections, or Scripture lessons, are chanted or
      read. --Fairholt.
      [1913 Webster]

   2. Hence: A reading desk, usually in the form of a stand with
      a slanted top that holds books or lecture notes at a
      height convenient for reading by a speaker who is
      standing. A modern lectern may be of adjustable height,
      and be fitted with a light to illuminate the material on
      the desk, and sometimes a microphone or other electrical
      equipment for use of a speaker.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Lecturn \Lec"turn\ (l[e^]k"t[u^]rn), n. [LL. lectrinum, fr.
   lectrum; cf. L. legere, lectum, to read.]
   Same as lectern. [Written also lectern and lettern.]
   --Fairholt.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lectern
    n 1: desk or stand with a slanted top used to hold a text at the
         proper height for a lecturer [syn: lectern, reading
         desk]