[1] : The Collaborative International Dictionary of English v.0.48

hardback \hard"back`\, hardbacked \hard"backed`\, hardcover
\hard"cover\ hard-bound \hard"-bound`\adj.
   having rigid front and back covers, usually boards covered
   with paper, cloth, or leather; -- of books. contrasted with
   softcover and paperback.
   wordnet 1.5
see also:
softcover paperback 

[2] : The Collaborative International Dictionary of English v.0.48

hardback \hard"back`\ n.
   a book with cardboard or cloth or leather covers; a hardcover
   book. compare paperback.

   syn: hardcover.
        wordnet 1.5
see also:
paperback 

[3] : WordNet (r) 2.0

hardback
     adj : having a hard back or cover; "hardback books" syn: hardbacked,
            hardbound, hardcover
     n : a book with cardboard or cloth or leather covers syn: hardcover
see also:
hardbacked hardbound hardcover 

Hardback >> H Words
Hardback, definition of term: Hardback
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