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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

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preposition     of pronunciation in American English
/əv/ strong    of pronunciation in American English
  1. 1
    used for saying who or what has a particular feature, aspect, or quality

    We were impressed by the size of the building.

    the color of the sky

    I don’t remember the name of the street.

    Synonyms and related words
  2. 2
    saying which specific thing
    1. a.
      used for saying which specific thing belonging to a more general type you are referring to

      I had a feeling of duty toward him.

      She seemed to like the idea of having children.

      the month of April

      the twin cities of Minneapolis and St. Paul

      Todd has the annoying habit of questioning everything I say.

      Synonyms and related words
    2. b.
      used for giving a specific age, amount, value, etc.

      She met Charles at the age of 20.

      She was a young girl of no more than 13.

      Teachers have been asking for a pay raise of 4 percent.

      Synonyms and related words
  3. 3
    saying who or what does something
    1. a.
      used after nouns that refer to actions for saying who or what does the action

      This is clearly the work of more than one person.

      the arrival of our train

      Synonyms and related words
    2. b.
      used after nouns that refer to actions for saying who or what is affected by the action

      The removal of the machine parts took several hours.

      Synonyms and related words
  4. 4
    used for saying who something belongs to

    the property of the residents

    They ended up living in the house of Jeanne’s oldest brother.

    Synonyms and related words
  5. 5
    concerning or showing someone or something

    She had a photograph of him beside her bed.

    It was a tale of war and bravery.

    a history of Russia

    Jerry kept thinking of the last time they’d met.

    I reminded her of her duty to her family.

  6. 6
    used for saying what something is part of

    He moved to the far side of the bed.

    a pain in the back of my head

    She sat on the edge of her chair.

    The roof of the church was damaged.

    Synonyms and related words
  7. 7
    containing or consisting of something
    1. a.
      used for saying what something contains

      He handed her a glass of water.

      a bag of nuts

      Synonyms and related words
    2. d.
      used for saying what group a particular person or thing is from

      She’s one of my best friends.

      Three of us went on vacation together.

      Several of the apartments cannot even be lived in.

      Synonyms and related words
  8. 8
    used after names and titles for talking about the relationship between a person and a place or organization

    He listed the kings and queens of England.

    the President of Syria

    the treasurer of the club

  9. 9
    used for saying what substance is used for making something
    Synonyms and related words
  10. 10
    used for giving dates and periods of time

    the 27th of November

    the last month of the year

  11. 11
    used after some adjectives for saying a person or thing that a feeling is directed toward

    You should be ashamed of yourself!

    I’m tired of their constant arguing.

    Maya ought to be proud of him.

    Synonyms and related words
  12. 12
    used for saying what type of person or thing has been described by another noun

    He was an angel of a child.

    Synonyms and related words
  13. 13
    used for saying which person behaves in a particular way in a situation
    it was nice/sweet/stupid etc. of someone:

    It was nice of you to help me.

    It was stupid of me to think they would agree.

    Synonyms and related words
  14. 14
    American used in saying the time to mean a particular number of minutes before the hour

    It’s twenty of two (=1:40).

    It’s a quarter of nine (=8:45).

  15. 15
    used for saying what causes something

    As a result of pollution, many species have died out.

    Synonyms and related words
  16. 16
    used for mentioning a quality that someone or something has

    He was a man of great charm.

    The research will be of great interest to many people.

    Synonyms and related words
  17. 17
    used for saying who wrote a book or play, produced a work of art, etc.

    the wonderful paintings of Picasso

    the plays of Tennessee Williams

  18. 18
    used for describing when something happens in relation to something else

    She didn’t invite him till the evening of the party.

    Eva’s father died the day of his 70th birthday.

  19. 19
    used for saying the period of time for which someone or something is the biggest, best, most important, etc.

    Reynolds was named businessman of the year in 1998.

    the most popular movie of the summer

  20. 20
    used for saying who has a particular relationship with someone else

    Lori is the daughter of my father’s sister.

    He was having an affair with the wife of a diplomat.

    a good friend of mine

    Synonyms and related words
  21. 21
    used for saying what type of activity or situation lasts for a particular period of time

    We had weeks of problems with the new computer system.

    Twelve years of peace were followed by two years of war.

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to manipulate someone psychologically so that they begin to question their own perceptions and memories

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Open Dictionary

Dunning-Kruger effect

the phenomenon by which an incompetent person is too incompetent to understand his own incompetence

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