Definition of "penetrable" []

• Capable of being penetrated: penetrable defenses; a penetrable wall. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Then a light emanated from the self-subsisting form by the order of God, the splendor of which spread upon the heaven, moving from point to point, and caused the material form (_i.e. _, the inferior, so-called penetrable form) to change its place."
• "Freemasonry is the oldest of all, still the biggest, and—in the public mind—about as penetrable as the mythic crypt beneath the ninth vault of Solomon's Temple."
• "At one point in the book you describe Central Asia as "Massive, sometimes flat, sometimes mountainous, sometimes terrifically hot, other times frigidly cold, plagued with thousands of miles of penetrable borders, lacking an identifiable geographic center, and home to citizens know figuratively and sometimes literally to cut the colonialist's throat… the death sentence of several empires which attempted to hold onto it.""