Able or seeming to penetrate: The penetrating odor of garlic soon filled the entire apartment.
Keenly perceptive or understanding; acute: The lecture provided penetrating insight into foreign affairs.
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.