ra•zorPronunciation: (rā'zur), [key]
a sharp-edged instrument used esp. for shaving the face or trimming the hair.
an electrically powered instrument used for the same purpose.
to shave, cut, or remove with or as if with a razor.
2. on the razor's edge,
in a difficult or precarious position.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.