The Collaborative International Dictionary of English v.0.48:

Tallis \Tal"lis\, n.
   Same as Tallith.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Tallis
    n 1: English organist and composer of church and secular music;
         was granted a monopoly in music printing with William Byrd
         (1505-1585) [syn: Tallis, Thomas Tallis]
    2: (Judaism) a shawl with a ritually knotted fringe at each
       corner; worn by Jews at morning prayer [syn: prayer shawl,
       tallith, tallis]