some online links

explicit (and shorter) definitions  

As noted in the introduction, a distinction can be drawn between specific and general definitions of planning. 

• see definitions listed elsewhere, to be selectively added here at a future date

discussions, which include definitions

• "I discuss and critique contemporary planning theory in terms of its usefulness in addressing what I believe to be its defining question: what is the possibility of consciously achieving widespread improvement in the quality of human life within the context of a global capitalist political economy."  New Directions in Planning Theory (Fainstein)