Definition of "key-point" []

• That point of a military position, intrenched or otherwise, in which its principal strength lies, and the loss of which would force the assailed to retire. (noun)

The Century Dictionary (Public Domain)

• "The new Shmoop Civics section offers charts, explanations, and key-point lists about the branches of US Government."
• "Thus the spell which seemed to shut from view this key-point of a vast interior country remained till the prophetic eye of capital discovered and possessed it."
• "This eddy makes the key-point of contact of the humid Gulf winds with the cool winds of the westerly current, and likewise being the northwestern terminal point of the course of the great northeasters, the contact being the cause of the excess in precipitation."