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v. pen·e·trat·ed, pen·e·trat·ing, pen·e·trates
1. To enter, pass into, or force a way into: The needle penetrated the skin. Light penetrated the forest canopy. The soldiers penetrated enemy territory.
a. To enter into and permeate: The sound of the piano penetrated each room of the house.
b. To affect deeply, as by being known or by arousing the emotions: "Literature should penetrate all the chambers of the human heart, even the dark ones" (Robert Cormier).
a. To insert the penis, a finger, or an object into the vagina or anus of (someone).
b. To insert something into (the vagina or anus).
4. To enter (an organization, for example), usually surreptitiously, so as to gain influence or information; infiltrate.
5. To enter and gain a share of (a market): penetrated the home-computer market with an affordable new model.
6. To grasp the significance of; understand: penetrate the workings of the immune system.
7. To see through: keen eyes that penetrate the darkness.
1. To enter or pass into something: The drill penetrated into the wood.
2. To have an effect or influence, especially on the mind or emotions: The culture of celebrity has penetrated into everyone's awareness.
3. To gain insight: tried to penetrate into the nature of the mind.

[Latin penetrāre, penetrāt-, from penitus, deeply.]

pen′e·tra′tor n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.penetrator - an intruder who passes into or through (often by overcoming resistance)
interloper, intruder, trespasser - someone who intrudes on the privacy or property of another without permission
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The demand for glass-sealed hybrid marine penetrators enables in saving space with rugged penetrator combining optical and electrical connectivity in compact device.
Summary: The demand for glass-sealed hybrid marine penetrators enables in saving space with rugged penetrator combining optical and electrical connectivity in compact device.
Post-Vietnam, the military decided it needed a bullet that had more penetration than a 55-grain jacketed bullet could offer The services wanted a bullet that could penetrate obstacles and armor A steel-core "penetrator" round allowed the 5.56x45mm cartridge to achieve the desired effects but at the expense of already limited terminal effects.
The planned weapons deal with Israel would provide 3,000 Hellfire missiles, 250 medium-range air-to-air missiles, 4,100 glide bombs and 50 BLU-113 "super penetrator" bombs designed to reach underground sites.
could do this by providing an appropriate number of GBU-57 30,000-pound bunker-buster bombs, known as the Massive Ordnance Penetrator or MOP, and several B-52 bombers.
If the deal is approved by Congress, Israel will also receive other tactical weapons, including 50 BLU-113 Super Penetrator and 700 BLU-109 Penetrator bunker buster missiles.
They're made of Samauri-style, .060-inch thick S30V Stainless Steel, have curved blades with 20-degree blade angles and feature a Penetrator bleeder blade made to blast a channel through bone for the arrow shaft and slim-profile Zero Tapered ferrule.
Raytheon Company (NYSE: RTN) and the French Air Force completed a demonstration of a penetrator variant of a Paveway GBU-50 from a Mirage 2000D multirole fighter jet.
A key part of the mission involves firing a "penetrator" rocket probe at Europa with the aim of sending information to the orbiting Juice satellite about the watery world below.
The steel penetrator was fired at a 10-tonne cube of ice to simulate the surface of Jupiter's moon Europa.
But some military analysts say the Massive Ordnance Penetrator as it is called, isn't needed and that Fordo can be put out of business simply by bombing its entrance and ventilator shafts.