1. [adj]  (informal) marked by excited activity; "a hot week on the stock market"
2. [adj]  (electricity) charged or energized with electricity; "a hot wire"; "a live wire"
3. [adj]  having or dealing with dangerously high levels of radioactivity; "hot fuel rods"; "a hot laboratory"
4. [adj]  of a seeker; near to the object sought; "you're getting warm"; "hot on the trail"
5. [adj]  having or showing great eagerness or enthusiasm; "hot for travel"
6. [adj]  very fast; "a blistering pace"; "got off to a hot start"; "in hot pursuit"; "a red-hot line drive"
7. [adj]  capable of quick response and great speed; "a hot sports car"
8. [adj]  newly made; "a hot scent"
9. [adj]  very good; often used in the negative; "he's hot at math but not so hot at history"
10. [adj]  used of physical heat; having a high or higher than desirable temperature or giving off heat or feeling or causing a sensation of heat or burning; "hot stove"; "hot water"; "a hot August day"; "a hot stuffy room"; "she's hot and tired"; "a hot forehead"
11. [adj]  extended meanings; especially of psychological heat; marked by intensity or vehemence especially of passion or enthusiasm; "a hot temper"; "a hot topic"; "a hot new book"; "a hot love affair"; "a hot argument"
12. [adj]  (informal) recently stolen or smuggled; "hot merchandise"; "a hot car"
13. [adj]  having or bringing unusually good luck; "hot at craps"; "the dice are hot tonight"
14. [adj]  newest or most recent; "news hot off the press"; "red-hot information"
15. [adj]  very unpleasant or even dangerous; "make it hot for him"; "in the hot seat"; "in hot water"
16. [adj]  (informal) very popular or successful; "one of the hot young talents"; "cabbage patch dolls were hot last season"
17. [adj]  having a piquant burning taste of spices or peppers; "gingery Chinese food"; "hot peppers"; "hot curry"; "corn chips with peppery salsa"; "spicy tomato sauce"
18. [adj]  sexually excited or exciting; "was hot for her"; "hot pants"
19. [adj]  (informal) performed or performing with unusually great skill and daring and energy; "a hot drummer"; "he's hot tonight"
20. [adj]  characterized by violent and forceful activity or movement; very intense; "the fighting became hot and heavy"; "a hot engagement"; "a raging battle"; "the river became a raging torrent"
21. [adj]  wanted by the police; "a hot suspect"
22. [adj]  (color) bold and intense; "hot pink"

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more details ...

1. \Hot\,
   imp. & p. p. of {Hote}. [Obs.] --Spenser.
   

2. \Hot\, a. [Compar. {Hotter}; superl. {Hottest}.] [OE. hot,
   hat, AS. h[=a]t; akin to OS. h[=e]t, D. heet, OHG. heiz, G.
   heiss, Icel. heitr, Sw. het, Dan. heed, hed; cf. Goth.
   heit[=o] fever, hais torch. Cf. {Heat}.]
   1. Having much sensible heat; exciting the feeling of warmth
      in a great degree; very warm; -- opposed to cold, and
      exceeding warm in degree; as, a hot stove; hot water or
      air. ``A hotvenison pasty.'' --Shak.
   2. Characterized by heat, ardor, or animation; easily
      excited; firely; vehement; passionate; violent; eager.
            Achilles is impatient, hot, and revengeful.
                                                  --Dryden.
            There was mouthing in hot haste.      --Byron.
   3. Lustful; lewd; lecherous. --Shak.
   4. Acrid; biting; pungent; as, hot as mustard.
   {Hot bed} (Iron Manuf.), an iron platform in a rolling mill,
      on which hot bars, rails, etc., are laid to cool.
   {Hot wall} (Gardening), a wall provided with flues for the
      conducting of heat, to hasten the growth of fruit trees or
      the ripening of fruit.
   {Hot well} (Condensing Engines), a receptacle for the hot
      water drawn from the condenser by the air pump. This water
      is returned to the boiler, being drawn from the hot well
      by the feed pump.
   {In hot water} (Fig.), in trouble; in difficulties. [Colloq.]
   Syn: Burning; fiery; fervid; glowing; eager; animated; brisk;
        vehement; precipitate; violent; furious; ardent;
        fervent; impetuous; irascible; passionate; hasty;
        excitable.