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Definition of blot noun from the Oxford Advanced American Dictionary

     

    blot

     noun
    noun
    NAmE//blɑt//
     
     
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  1. 1a spot or dirty mark on something, made by ink, etc. Thesaurusmark
    • stain
    • fingerprint
    • streak
    • speck
    • blot
    • smear
    • spot
    These are all words for a small area of dirt or another substance on a surface.
    • mark a small area of dirt or other substance on the surface of something, especially one that spoils its appearance:The kids left dirty marks all over the kitchen floor.
    • stain a dirty mark on something that is difficult to remove, especially one made by a liquid:blood stains
    • fingerprint a mark on a surface made by the pattern of lines on the end of a person's finger, often used by the police to identify criminals:Her fingerprints were all over the gun.
    • streak a long thin mark or line that is a different color from the surface it is on:She had streaks of gray in her hair.
    • speck a very small mark, spot, or piece of a substance on something:There isn't a speck of dust anywhere in the house.
    • blot a spot or dirty mark left on something by a substance such as ink being dropped on a surface:an ink blot
    • smear a mark made by something such as oil or paint being spread or rubbed on a surface:She had smears of paint on her dress.
    • spot a small dirty mark on something:He found grease spots all over the walls.
    Patterns
    • a streak/speck/blot/smear/spot of something
    • a greasy mark/stain/smear
    • a/an ink mark/stain/blot/spot
    • a/an grease mark/stain/spot
    • to leave a mark/stain/fingerprint/streak/speck/blot/smear
  2. 2blot (on something) something that spoils the opinion that other people have of you, or your happiness Her involvement in the fraud has left a serious blot on her reputation. There was just a tiny blot on his happiness.
  3. Idioms
    a blot on the landscape
     
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    an object, especially an ugly building, that spoils the beauty of a place
See blot in the Oxford Advanced Learner's Dictionary