DICT.TW Dictionary Taiwan

 on the spot
 當場,在現場;處于困境;立刻,馬上

 Spot n.
 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.”
    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. Zool. A variety of the common domestic pigeon, so called from a spot on its head just above its beak.
 6. Zool. (a) A sciaenoid 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 Zool., any butterfly of the family Melitaeidae 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 illumination; -- called also spotted lens.
 Spot rump Zool., the Hudsonian godwit (Limosa haemastica).
 Spots on the sun. Astron. See Sun spot, ander Sun.
 On the spot, or  Upon the spot, immediately; before moving; without changing place; as, he made his decision on the spot.
    It was determined upon the spot.   --Swift.
 Syn: -- Stain; flaw; speck; blot; disgrace; reproach; fault; blemish; place; site; locality.

 on the spot
      adv 1: without delay or immediately; "we hired her on the spot";
             "thought they were going to shoot us down on the spot"
      2: in a difficult situation; "that question really put him on
         the spot"
      3: at the place in question; there; "they were on the spot when
         it happened"; "it had to be decided by the man on the
         spot"