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Definition of dot noun from the Oxford Advanced American Dictionary

      

    dot

     noun
    noun
    NAmE//dɑt//
     
     
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  1. 1a small round mark, especially one that is printed There are dots above the letters i and j. Text and graphics are printed at 300 dots per inch. The helicopters appeared as two black dots on the horizon. The island is a small green dot on the map. Thesauruspatch
    • dot
    • mark
    • spot
    These are all words for a small part on a surface that is a different color from the rest.
    • patch an area of something, especially one which is different from the area around it:a white dog with a black patch around its eye patches of dense fog
    • dot a small round mark on something, especially one that is printed:The letters “i” and “j” have dots over them. The island is a small green dot on the map. Periods and decimal points are often referred to as “dots,” especially when talking about computers:The file is called “my essay dot doc.” The IP address is “192 dot 168 dot zero dot zero.”
    • mark a noticeable area of color on the body of a person or an animal:The horse had a white mark on his head.
    • spot a small round area that is a different color or feels different from the surface it is on:Which one has spots—a leopard or a tiger?
    Patterns
    • a patch/dot/mark/spot on something
    • with patches/dots/marks/spots
    • a blue/black/red, etc. patch/dot/mark/spot
  2. 2(computing) a symbol like a period used to separate parts of a domain name, a URL or an e-mail address
    3. Thesauruspatch
    • dot
    • mark
    • spot
    These are all words for a small part on a surface that is a different color from the rest.
    • patch an area of something, especially one which is different from the area around it:a white dog with a black patch around its eye patches of dense fog
    • dot a small round mark on something, especially one that is printed:The letters “i” and “j” have dots over them. The island is a small green dot on the map. Periods and decimal points are often referred to as “dots,” especially when talking about computers:The file is called “my essay dot doc.” The IP address is “192 dot 168 dot zero dot zero.”
    • mark a noticeable area of color on the body of a person or an animal:The horse had a white mark on his head.
    • spot a small round area that is a different color or feels different from the surface it is on:Which one has spots—a leopard or a tiger?
    Patterns
    • a patch/dot/mark/spot on something
    • with patches/dots/marks/spots
    • a blue/black/red, etc. patch/dot/mark/spot
    Idioms
    on the dot (informal)
     
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    exactly on time or at the exact time mentioned The taxi showed up on the dot. Breakfast is served at 8 on the dot. Please tell him I'll call him on the dot of twelve.
See dot in the Oxford Advanced Learner's Dictionary
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