the act or power of penetrating.
mental acuteness, discernment, or insight: a scholar of rare penetration.
the obtaining of a share of a market for some commodity or service.
the extension, usually peaceful, of the influence of one nation or culture into the affairs of another.
a military attack that penetrates into enemy territory.
Gunnery. the depth to which a projectile goes into the target.
the measure of relative depth of field of a telescope or microscope, especially a binocular microscope.

1595–1605; < Late Latin penetrātiōn- (stem of penetrātiō). See penetrate, -ion

nonpenetration, noun
prepenetration, noun
self-penetration, noun
transpenetration, noun

2. understanding, perception, discrimination, depth, profundity. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
penetration (ˌpɛnɪˈtreɪʃən)
1.  the act or an instance of penetrating
2.  the ability or power to penetrate
3.  keen insight or perception
4.  military an offensive manoeuvre that breaks through an enemy's defensive position
5.  Also called: market penetration the proportion of the total number of potential purchasers of a product or service who either are aware of its existence or actually buy it
6.  another name for depth of field

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
They suffer from import penetration more than the multinationals.
Other things can be done to increase broadband penetration before dipping into
  the public coffers.
Each one of those has a fiscal interest in slowing the development and market
  penetration of nuclear energy.
He excelled at hagiography and left psychological penetration mostly in the eye
  of the beholder.
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