penetration

penetration — noun

1. the act of going into something, passing through it, or gaining a place within a

1.nounC2
Definition

the act of going into something, passing through it, or gaining a place within a market or system

Example

Rainwater penetration cracked the paint on the kitchen ceiling.

material damage use

Engineers tested the helmet for nail penetration in the lab.

penetration in safety testing

Common collocations
  • market penetration
  • water penetration
  • penetration into rock
  • penetration through glass
  • deep penetration
Synonyms
  • entry

    is broader and can describe simply going in, without the idea of pushing through

  • intrusion

    suggests unwanted or unwelcome entry

  • access

    focuses on the chance or right to get in, not the act itself

  • reach

    is common in business for spread or coverage, especially among customers

Antonyms
  • blockage

    suggests something stopping movement inward

  • exclusion

    focuses on being kept out of a place, system, or market

Grammar Patterns

penetration into something

penetration through something

market penetration

Usage Note

Usually uncountable in technical and business writing. Common after into or through when naming a material or space, and before market when talking about how far a product has entered sales in a place.

Common Mistakes

The company has a high penetration in the Korean market.
The company has high market penetration in the Korean market.
this noun is usually uncountable in business use.
The nail made a deep penetrate in the wall.
The nail made a deep penetration into the wall.
use 'penetration' as the noun, not the verb 'penetrate'.

2. sex in which one partner puts part of the body, especially the genitals, or an o

2.nounC2
Definition

sex in which one partner puts part of the body, especially the genitals, or an object inside the other person's body

Example

The school health booklet defines penetration as one kind of sexual contact.

sex-education definition use

During the exam, the doctor asked whether penetration caused pain.

medical discussion use

Common collocations
  • pain during penetration
  • penetration without consent
  • avoid penetration
  • deep penetration
  • include penetration
Synonyms
  • intercourse

    is more formal and often refers to sex more broadly, not only insertion

  • insertion

    is more clinical and can refer to many non-sexual actions as well

  • vaginal sex

    is narrower because it excludes other kinds of penetration

Grammar Patterns

penetration without consent

avoid penetration

pain during penetration

Usage Note

Usually uncountable when speaking generally. Common in clinical, legal, and educational writing, often with words such as consent, pain, or include. Distinguish from sense 1, which is about physical or market entry rather than sex.

Common Mistakes

Sex always means penetration.
Sex does not always mean penetration.
penetration is only one possible part of sexual activity.
The doctor asked about a penetration.
The doctor asked about penetration.
this sense is usually uncountable when discussed in general.

3. a strong ability to understand what is really happening and see important meanin

3.nounC2
Definition

a strong ability to understand what is really happening and see important meaning quickly

Example

Mia's interview notes showed real penetration in the bank fraud case.

show penetration

The young editor wrote with penetration about the mayor's land deal.

write with penetration

Common collocations
  • show penetration
  • great penetration
  • penetration in analysis
  • write with penetration
  • lack penetration
Synonyms
  • insight

    is the most common modern word for clear deep understanding

  • perception

    can stress noticing fine details or hidden meaning

  • discernment

    sounds more formal and stresses good judgment

  • understanding

    is broader and less focused on quick sharp perception

Antonyms
  • shallowness

    means lack of depth in thought or analysis

  • blindness

    suggests failure to notice what matters

Grammar Patterns

show penetration

write with penetration

lack penetration

Usage Note

Mostly found in formal writing about thinking, criticism, or analysis. Often appears after show, with, or lack. Distinguish from sense 1, which is about going inside something physically, and from sense 2, which is sexual.

Common Mistakes

Her essay had many penetrations about art.
Her essay showed real penetration in its discussion of art.
this sense is uncountable and is not normally used in the plural.
The report was very penetration.
The report showed great penetration.
use the noun here, or choose the adjective 'penetrating'.

Word family

Synonym discussion

Sense: noun/1

For noun/1, penetration suggests getting into something by passing through a surface, barrier, material, or established system. Entry is broader and can describe simply going in, without the idea of force or depth. Access usually means the ability, chance, or right to get in, rather than the act itself. Intrusion adds the idea that the entry is unwanted or harmful. Reach is especially useful in business and marketing for how widely a product or message spreads, but it does not normally suggest breaking through a barrier. You can talk about water penetration through a wall, employee access to a file, an intrusion into private data, or a brand's reach across Southeast Asia.

entry ↗accessintrusion ↗reach ↗

Etymology

LatinFrenchMiddle EnglishEnglish

Penetration comes from the same word family as penetrate. It goes back through French to Latin penetrare, meaning to go into or put into the inside of something. That basic image of moving inward later developed wider uses in English, including entering a market and seeing deeply into a subject or situation.