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know

A1
noun
Very common

Pronunciation

UK

  • /nˈəʊ/

US

  • /ˈnoʊ/

Meanings

Verb

  1. to have information, understanding, or certainty about something

  2. to be familiar with someone, something, or a skill through experience

Beyond the definition

To know may look simple, but it has a few common uses. We know facts, like knowing that Paris is the capital of France. We also know people, meaning we have met them and are familiar with them. Sometimes, know means understanding something from personal experience: "I know what it feels like to be tired."

You can also know how to do something, which means you have the skill, like knowing how to ride a bike. You might know a secret, which means you have information that others may not have. And the phrase "let someone know" simply means to tell them something.

Examples

  1. 1

    Basic question

    Do you know the answer?

  2. 2

    Work connection

    I know Maria from work.

  3. 3

    Long relationship

    I've known Sam for years.

    • GrammarI've known someone for years

      I met them years ago and still know them now

  4. 4

    Schedule fact

    I know the meeting starts at nine.

More examples
  1. 5

    Unknown information

    I don't know where he lives.

  2. 6

    Practical skill

    Do you know how to change a tire?

    • Patternknow how to + verb

      have the skill or information to do it

  3. 7

    Background information

    We don't know much about his childhood.

    • Patternknow about + topic

      have information about it

  4. 8

    Heard about it

    I know of a quiet cafe near the station, but I've never been there.

    • Patternknow of + thing/place

      have heard that it exists

  5. 9

    Personal experience

    I know from experience that rushing usually causes mistakes.

    • Phraseknow from experience

      have learned because it happened to you

  6. 10

    Polite update

    Please let me know when you arrive.

    • Patternlet someone know

      tell someone

  7. 11

    Becoming familiar

    It took me a while to get to know the new system.

    • Patternget to know + person/thing

      become familiar with them or it over time

  8. 12

    Shared understanding

    I know what you mean; this schedule is hard to follow.

    • PhraseI know what you mean

      I understand your point or feeling

  9. 13

    Wiser choice

    You should know better than to open strange email links.

    • Patternknow better than to + verb

      understand that doing it is wrong or unwise

  10. 14

    Limited knowledge

    As far as I know, the tickets are still available.

    • Phraseas far as I know

      based on the information I have

  11. 15

    Uncertain possibility

    You never know; the weather might clear up by noon.

    • Phraseyou never know

      something is possible even if you cannot be sure

See also

Similar

Shades of meaning

Contrast

Do not confuse

Used with (collocations)

  • know that
  • know about
  • know for sure
  • as far as I know

Word family

Explore

Forms and spellings

5 forms open this card.

Main spelling

  • knowverbnoun

Forms

  • knownpast participleverbnoun
  • knewpast tenseverbnoun
  • knowsverbnoun
  • knowing-ing formverbnoun