1. [n]  an act that brings discredit to the person who does it; "he made a huge blot on his copybook"
2. [n]  
3. [n]  a business establishment for entertainment; "night spot"
4. [n]  a playing card with a specified number of pips on it to indicate its value; "an eight spot"
5. [n]  a lamp that produces a strong beam of light to illuminate a restricted area; used to focus attention of a stage performer
6. [n]  a small contrasting part of something; "a bald spot"; "a leopard's spots"; "a patch of clouds"; "patches of thin ice"; "a fleck of red"
7. [n]  a blemish made by dirt; "he had a smudge on his cheek"
8. [n]  an outstanding characteristic; "his acting was one of the high points of the movie"
9. [n]  a section of an entertainment that is assigned to a specific performer or performance; "they changed his spot on the program"
10. [n]  a short section or illustration (as between radio or tv programs or in a magazine) that is often used for advertising
11. [n]  a mark on a playing card (shape depending on the suit)
12. [n]  a point located with respect to surface features of some region; "this is a nice place for a picnic"
13. [n]  (British) a small quantity; "a spot of tea"; "a bit of paper"
14. [n]  a slight attack of illness; "he has a touch of rheumatism"
15. [v]  mark with a spot or spots so as to allow easy recognition; "spot the areas that one should clearly identify"
16. [v]  become spotted; "This dress spots quickly"
17. [v]  make a spot or mark onto; "The wine spotted the tablecloth"
18. [v]  mar or impair with a flaw; "her face was blemished"
19. [v]  catch sight of

Spot
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1. \Spot\, a.
   Lit., being on the spot, or place; hence (Com.), on hand for
   immediate delivery after sale; -- said of commodities; as,
   spot wheat.
   

2. \Spot\, n. [Cf. Scot. & D. spat, Dan. spette, Sw. spott
   spittle, slaver; from the root of E. spit. See {Spit} to
   eject from the mouth, and cf. {Spatter}.]
   1. A mark on a substance or body made by foreign matter; a
      blot; a place discolored.
            Out, damned spot! Out, I say!         --Shak.
   2. A stain on character or reputation; something that soils
      purity; disgrace; reproach; fault; blemish.
            Yet Chloe, sure, was formed without a spot. --Pope.
   3. A small part of a different color from the main part, or
      from the ground upon which it is; as, the spots of a
      leopard; the spots on a playing card.
   4. A small extent of space; a place; any particular place.
      ``Fixed to one spot.'' --Otway.
            That spot to which I point is Paradise. --Milton.
            ``A jolly place,'' said he, ``in times of old! But
            something ails it now: the spot is cursed.''
                                                  --Wordsworth.
   5. (Zo["o]l.) A variety of the common domestic pigeon, so
      called from a spot on its head just above its beak.
   6. (Zo["o]l.)
      (a) A sci[ae]noid food fish ({Liostomus xanthurus}) of the
          Atlantic coast of the United States. It has a black
          spot behind the shoulders and fifteen oblique dark
          bars on the sides. Called also {goody}, {Lafayette},
          {masooka}, and {old wife}.
      (b) The southern redfish, or red horse, which has a spot
          on each side at the base of the tail. See {Redfish}.
   7. pl. Commodities, as merchandise and cotton, sold for
      immediate delivery. [Broker's Cant]
   {Crescent spot} (Zo["o]l.), any butterfly of the family
      {Melit[ae]id[ae]} having crescent-shaped white spots along
      the margins of the red or brown wings.
   {Spot lens} (Microscopy), a condensing lens in which the
      light is confined to an annular pencil by means of a
      small, round diaphragm (the spot), and used in dark-field
      ilumination; -- called also {spotted lens}.
   {Spot rump} (Zo["o]l.), the Hudsonian godwit ({Limosa
      h[ae]mastica}).
   {Spots on the sun}. (Astron.) See {Sun spot}, ander {Sun}.
   {On}, or {Upon}, {the spot}, immediately; before moving;
      without changing place.
            It was determined upon the spot.      --Swift.
   Syn: Stain; flaw; speck; blot; disgrace; reproach; fault;
        blemish; place; site; locality.
   

3. \Spot\, v. t. [imp. & p. p. {Spotted}; p. pr. & vb. n.
   {Spotting}.]
   1. To make visible marks upon with some foreign matter; to
      discolor in or with spots; to stain; to cover with spots
      or figures; as, to spot a garnment; to spot paper.
   2. To mark or note so as to insure recognition; to recognize;
      to detect; as, to spot a criminal. [Cant]
   3. To stain; to blemish; to taint; to disgrace; to tarnish,
      as reputation; to asperse.
            My virgin life no spotted thoughts shall stain.
                                                  --Sir P.
                                                  Sidney.
            If ever I shall close these eyes but once, May I
            live spotted for my perjury.          --Beau. & Fl.
   {To spot timber}, to cut or chip it, in preparation for
      hewing.
   

4. \Spot\, v. i.
   To become stained with spots.