high noon

Noun

 * 1)  Exactly noon; midday (when the sun is at its highest).
 * 2)  The zenith or apex of one's life or of a certain activity or era.
 * 3)  A time, set out in advance, at which an important decision is to be made or a nemesis is to be confronted
 * 4) * 1860 January 27, William Lloyd Garrison, annual meeting, Massachusetts Anti-Slavery Society, as quoted in Liberator (1860 February 3)
 * whereas, ten years since, there were thousands who could not endure my lightest word of rebuke to the South, they can now easily swollow John Brown whole, and his rifle into the bargain. In firing his gun, he has merely told us what time of day it is. It is high noon, thank God!
 * 1)  A time, set out in advance, at which an important decision is to be made or a nemesis is to be confronted
 * 2) * 1860 January 27, William Lloyd Garrison, annual meeting, Massachusetts Anti-Slavery Society, as quoted in Liberator (1860 February 3)
 * whereas, ten years since, there were thousands who could not endure my lightest word of rebuke to the South, they can now easily swollow John Brown whole, and his rifle into the bargain. In firing his gun, he has merely told us what time of day it is. It is high noon, thank God!
 * whereas, ten years since, there were thousands who could not endure my lightest word of rebuke to the South, they can now easily swollow John Brown whole, and his rifle into the bargain. In firing his gun, he has merely told us what time of day it is. It is high noon, thank God!

Usage notes
For high noon versus twelve o'clock high, see twelve o'clock § Usage notes.