Meaning of turning point

turn'ing point"

Pronunciation: [key]
  1. a point at which a decisive change takes place; critical point; crisis.
  2. a point at which something changes direction, esp. a high or low point on a graph.
  3. a point temporarily located and marked in order to establish the elevation or position of a surveying instrument at a new station.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.