Q. What does systematic review mean?

From ---A Dictionary of Psychology. Edited by Andrew M. Colman. Oxford University Press 2009. Oxford Reference Online. Oxford University Press.  Camden County College.  20 September 2011. 

A review of research using methodical and organized procedures for identifying, selecting, appraising, and synthesizing the primary findings of a large number of research studies. It is especially suited to reviews whose principal aim is to assemble, pool, and summarize research data relevant to a clearly specified question or set of questions.

From-- A Dictionary of Nursing. Oxford University Press, 2008. Oxford Reference Online. Oxford University Press.  Camden County College.  20 September 2011. 

A structured method of critical appraisal of all available literature relevant to a specific research topic, using a rigorous statistical approach. It is undertaken to provide information about the phenomenon of interest across a wide range of settings and empirical methods, to examine the extent to which empirical evidence supports or contradicts a hypothesis, or to generate a new hypothesis.