a coign of vantage

a coign of vantage

dated A beneficial spot or position, especially for viewing something. "Coign" is an archaic spelling of "quoin," the outside corner of a building or wall. My office affords me a fine coign of vantage, as I can watch everyone on the floor without them knowing,
See also: coign, of, vantage
Farlex Dictionary of Idioms.

coign of vantage

a favourable position for observation or action. literary
The literal sense of a coign of vantage is ‘a projecting corner of a wall or building’; the phrase appears in Shakespeare 's Macbeth in Duncan's description of the nesting places of the swifts at Macbeth's castle. The word quoin meaning ‘an external angle of a building’ still exists in English, but the archaic spelling coign survives mainly in this phrase.
See also: coign, of, vantage
Farlex Partner Idioms Dictionary
See also:
  • coign
  • coign of vantage
  • vantage
  • any fule kno
  • put asunder
  • another pair of eyes
  • a fresh pair of eyes
  • go out of use
  • au naturel
  • of that ilk
References in classic literature
If one has a taste for that kind of thing the merest starting-point becomes a coign of vantage, and then by a series of logically deducted verisimilitudes one arrives at truth--or very near the truth--as near as any circumstantial evidence can do.