know

/nou/
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know

A student knows the answer to the math problem on the chalkboard.

Definition
  1. Verb:
    • To have information in one's mind; to be aware of something: To possess knowledge or understanding about a fact, subject, or skill.
    • To be acquainted or familiar with a person, place, or thing: To have met someone or to have experience with something.
    • To recognize or identify: To be able to distinguish one person or thing from another.
    • To have personal experience of a feeling or situation: To have undergone or felt something directly.
Usage

The verb "know" is used to express possession of knowledge, familiarity, or recognition. It is a stative verb, typically describing a state rather than an action, and is not usually used in continuous tenses (e.g., "I am knowing" is incorrect). It is often followed by a noun, pronoun, clause (starting with "that," "what," "how," etc.), or an infinitive phrase ("how to...").

Examples
  • Factual Knowledge:
    • I know that Paris is the capital of France.
    • Do you know the answer to this question?
  • Familiarity with a Person:
    • We know our neighbors very well.
    • She has known him since childhood.
  • Recognition or Distinction:
    • I would know that voice anywhere.
    • A good chef knows fresh ingredients from stale ones.
  • Skill or Ability:
    • He knows how to speak three languages.
    • Does she know how to drive?
  • Personal Experience:
    • They have known great hardship in their lives.
    • I know the feeling of disappointment.
Advanced Usage
  • "To be in the know" (Idiomatic Phrase): To have special or inside information that is not known to most people.
    • As a journalist, she is always in the know about political scandals.
  • "To know better (than to do something)": To be wise or experienced enough to avoid doing something foolish.
    • You're an adult; you should know better than to believe those rumors.
  • "To know something inside out" / "To know something like the back of one's hand": To know something in great detail and completely.
    • After 20 years with the company, he knows the business inside out.
  • "Not that I know of": A phrase used to say that you think something is not true, based on the information you have.
    • "Has the mail arrived?" "Not that I know of."
Variants and Related Words
  • Knowledge (n): The facts, information, and skills acquired through experience or education.
    • His knowledge of history is impressive.
  • Known (adj): Recognized, familiar, or within people's awareness.
    • She is a known expert in the field.
  • Knowing (adj): Suggesting that one has secret knowledge or understanding.
    • She gave me a knowing smile.
  • Well-known (adj): Widely or generally known; famous.
    • He is a well-known author.
Synonyms
  • Be aware of: To have knowledge or perception of a situation or fact.
  • Be familiar with: To have a good knowledge or understanding of something.
  • Recognize: To identify someone or something from having encountered them before.
  • Understand: To perceive the meaning, significance, or nature of something.
Related Phrasal Verbs
  • Know of: To have heard about or have some information concerning something or someone, but not necessarily detailed or personal knowledge.
    • I know of a good restaurant near here, but I've never been there myself.
  • Know about: To possess information concerning a particular subject or event.
    • Do you know about the meeting schedule change?
Related Idioms
  • "Know the ropes": To understand the details and procedures of a particular task or job.
    • Don't worry, she'll train you until you know the ropes.
  • "Know which side one's bread is buttered on": To know where one's best interests lie; to know who to please to gain advantages.
    • He's very loyal to the boss; he knows which side his bread is buttered on.
  • "You never know": Used to say that something is possible, even if it seems unlikely.
    • Take an umbrella with you—you never know, it might rain.
know

A student knows the answer to the math problem on the chalkboard.

Noun
  1. the fact of being aware of information that is known to few people
    • he is always in the know
Verb
  1. perceive as familiar
    • I know this voice!
  2. be able to distinguish, recognize as being different
    • The child knows right from wrong
  3. know the nature or character of
    • we all knew her as a big show-off
  4. have sexual intercourse with
    • This student sleeps with everyone in her dorm
    • Adam knew Eve
    • Were you ever intimate with this man?
  5. have fixed in the mind
    • I know Latin
    • This student knows her irregular verbs
    • Do you know the poem well enough to recite it?
  6. accept (someone) to be what is claimed or accept his power and authority
    • The Crown Prince was acknowledged as the true heir to the throne
    • We do not recognize your gods
  7. have firsthand knowledge of states, situations, emotions, or sensations
    • I know the feeling!
    • have you ever known hunger?
    • I have lived a kind of hell when I was a drug addict
    • The holocaust survivors have lived a nightmare
    • I lived through two divorces
  8. be familiar or acquainted with a person or an object
    • She doesn't know this composer
    • Do you know my sister?
    • We know this movie
    • I know him under a different name
    • This flower is known as a Peruvian Lily
  9. be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
    • I know that I left the key on the table
    • Galileo knew that the earth moves around the sun
  10. know how to do or perform something
    • She knows how to knit
    • Does your husband know how to cook?
  11. be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
    • I know that the President lied to the people
    • I want to know who is winning the game!
    • I know it's time