noun.
the act of shaking one's head, in disagreement or disapproval
noun.disagreement or disapproval
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the act of turning your head left and right to signify denial or disbelief or bemusement
Word Usage
"There is, however, a fine line, a careful balance, between communicating inspiration and enthusiasm, and generating the kind of headshaking and 'blistering comments' Greer picked up at the back of the hall."