Meaning of penetration

pen•e•tra•tion

Pronunciation: (pen"i-trā'shun), [key]
— n.
  1. the act or power of penetrating.
  2. mental acuteness, discernment, or insight: a scholar of rare penetration.
  3. the obtaining of a share of a market for some commodity or service.
  4. the extension, usually peaceful, of the influence of one nation or culture into the affairs of another.
  5. a military attack that penetrates into enemy territory.
  6. the depth to which a projectile goes into the target.
  7. the measure of relative depth of field of a telescope or microscope, esp. a binocular microscope.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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