Dictionary > English Dictionary > Definition, synonym and antonym of heat
Meaning of heat by Wiktionary Dictionary



    • enPR: hēt, IPA: /hiːt/, X-SAMPA: /hi:t/
    • Rhymes: -iːt

    Etymology 1

    Old English hæte .


    heat ( countable and uncountable; plural: heats )

    1. ( uncountable, physics ) thermal energy
      This furnace puts out 5000 BTUs of heat .
      That engine is really throwing off some heat .
      Removal of heat from the liquid caused it to turn into a solid .
    2. ( uncountable ) The condition or quality of being hot .
      Stay out of the heat of the sun!
    3. ( uncountable ) An attribute of a spice that causes a burning sensation in the mouth .
      The chili sauce gave the dish heat .
    4. ( uncountable ) A period of intensity, particularly of emotion .
      It's easy to make bad decisions in the heat of the moment
    5. ( uncountable ) An undesirable amount of attention .
      The heat from her family after her DUI arrest was unbearable .
    6. ( uncountable, slang ) The police .
      The heat! Scram!
    7. ( uncountable, slang ) One or more firearms.
    8. ( countable, baseball ) A fastball .
      The catcher called for the heat, high and tight .
    9. ( uncountable ) A condition where a mammal is aroused sexually or where it is especially fertile and therefore eager to mate .
      The male canines were attracted by the female in heat .
    10. ( countable ) A preliminary race, used to determine the participants in a final race
      The runner had high hopes, but was out of contention after the first heat .
    11. ( countable ) One cycle of bringing metal to maximum temperature and working it until it is too cool to work further
      I can make a scroll like that in a single heat .
    12. ( countable ) A hot spell .
      The children stayed indoors during this year's summer heat .
    Derived terms

    Etymology 2

    Old English hætan


    • eath, haet, hate, heta, Thea

Explanation of heat by Wordnet Dictionary


    1. make hot or hotter

    2. the sun heats the oceans
      heat the water on the stove
    3. gain heat or get hot

    4. The room heated up quickly
    5. arouse or excite feelings and passions

    6. provide with heat

    7. heat the house
    1. utility to warm a building

    2. the heating system wasn't working
      they have radiant heating
    3. the trait of being intensely emotional

    4. the presence of heat

    5. the sensation caused by heat energy

    6. a preliminary race in which the winner advances to a more important race

    7. a form of energy that is transferred by a difference in temperature

    8. applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

    Definition of heat by GCIDE Dictionary


    1. Heat ( hēt ), n. [OE. hete, hæte, AS. hǣtu, hǣto, fr. hāt hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See Hot.]
      1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion and evaporation, and which, as manifested in fire, the sun's rays, mechanical action, chemical combination, etc., becomes directly known to us through the sense of feeling. In its nature heat is a mode of motion, being in general a form of molecular disturbance or vibration. It was formerly supposed to be a subtile, imponderable fluid, to which was given the name caloric.

      ☞ As affecting the human body, heat produces different sensations, which are called by different names, as heat or sensible heat, warmth, cold, etc., according to its degree or amount relatively to the normal temperature of the body.

      2. The sensation caused by the force or influence of heat when excessive, or above that which is normal to the human body; the bodily feeling experienced on exposure to fire, the sun's rays, etc.; the reverse of cold.

      3. High temperature, as distinguished from low temperature, or cold; as, “the heat of summer and the cold of winter; heat of the skin or body in fever, etc.”

      Else how had the world . . .

      Avoided pinching cold and scorching heat! Milton.

      4. Indication of high temperature; appearance, condition, or color of a body, as indicating its temperature; redness; high color; flush; degree of temperature to which something is heated, as indicated by appearance, condition, or otherwise.

      It has raised . . . heats in their faces. Addison.

      The heats smiths take of their iron are a blood-red heat, a white-flame heat, and a sparkling or welding heat. Moxon.

      5. A single complete operation of heating, as at a forge or in a furnace; as, “to make a horseshoe in a certain number of heats”.

      6. A violent action unintermitted; a single effort; a single course in a race that consists of two or more courses; as, “he won two heats out of three”.

      Many causes . . . for refreshment betwixt the heats. Dryden.

      [He] struck off at one heat the matchless tale of “Tam o' Shanter.” J. C. Shairp.

      7. Utmost violence; rage; vehemence; as, “the heat of battle or party”. “The heat of their division.” Shak.

      8. Agitation of mind; inflammation or excitement; exasperation. “The heat and hurry of his rage.” South.

      9. Animation, as in discourse; ardor; fervency; as, “in the heat of argument”.

      With all the strength and heat of eloquence. Addison.

      10. ( Zool. ) Sexual excitement in animals; readiness for sexual activity; estrus or rut.

      11. Fermentation.

      12. Strong psychological pressure, as in a police investigation; as, “when they turned up the heat, he took it on the lam”. [slang]

      Animal heat, Blood heat, Capacity for heat, etc. See under Animal, Blood, etc. -- Atomic heat ( Chem. ), the product obtained by multiplying the atomic weight of any element by its specific heat. The atomic heat of all solid elements is nearly a constant, the mean value being 6.4. -- Dynamical theory of heat, that theory of heat which assumes it to be, not a peculiar kind of matter, but a peculiar motion of the ultimate particles of matter. Heat engine, any apparatus by which a heated substance, as a heated fluid, is made to perform work by giving motion to mechanism, as a hot-air engine, or a steam engine. -- Heat producers. ( Physiol. ) See under Food. -- Heat rays, a term formerly applied to the rays near the red end of the spectrum, whether within or beyond the visible spectrum. -- Heat weight ( Mech. ), the product of any quantity of heat by the mechanical equivalent of heat divided by the absolute temperature; -- called also thermodynamic function, and entropy. -- Mechanical equivalent of heat. See
      under Equivalent. -- Specific heat of a substance ( at any temperature ), the number of units of heat required to raise the temperature of a unit mass of the substance at that temperature one degree. -- Unit of heat, the quantity of heat required to raise, by one degree, the temperature of a unit mass of water, initially at a certain standard temperature. The temperature usually employed is that of 0° Centigrade, or 32° Fahrenheit.

    2. Heat ( hēt ), v. t. [imp. & p. p. Heated; p. pr. & vb. n. Heating.] [OE. heten, AS. hǣtan, fr. hāt hot. See Hot.]
      1. To make hot; to communicate heat to, or cause to grow warm; as, “to heat an oven or furnace, an iron, or the like”.

      Heat me these irons hot. Shak.

      2. To excite or make hot by action or emotion; to make feverish.

      Pray, walk softly; do not heat your blood. Shak.

      3. To excite ardor in; to rouse to action; to excite to excess; to inflame, as the passions.

      A noble emulation heats your breast. Dryden.

    3. Heat, v. i.
      1. To grow warm or hot by the action of fire or friction, etc., or the communication of heat; as, “the iron or the water heats slowly”.

      2. To grow warm or hot by fermentation, or the development of heat by chemical action; as, “green hay heats in a mow, and manure in the dunghill”.

    4. Heat ( hĕt ), imp. & p. p. of Heat. Heated; as, “the iron though heat red-hot”. [Obs. or Archaic] Shak.