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. | Gunnery. 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. |
penetration