heat

Objects that give off heat — or a feeling of warmth — include the sun, a radiator, and even your body. You can feel a marked difference in air temperature if you hold your hand near the heat of a candle flame, for example.

Heat can also mean the intensity of an emotion. In the heat of an argument, you need to watch what you say, because you may regret it later. The verb heat means to make something hot, like when you heat up last night's pizza to eat for lunch today. When things heat up, they become exciting or intense, the way thrilling chase scenes heat up your favorite action movie.

Definitions of heat
  1. noun
    a form of energy that is transferred by a difference in temperature
    synonyms: heat energy
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    types:
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    geothermal energy
    energy derived from the heat in the interior of the earth
    heat of dissociation
    the heat required for a fluid substance to break up into simpler constituents
    heat of formation
    the heat evolved or absorbed during the formation of one mole of a substance from its component elements
    heat of solution
    the heat evolved or absorbed when one mole of a substance is dissolved in a large volume of a solvent
    heat of transformation, latent heat
    heat absorbed or radiated during a change of phase at a constant temperature and pressure
    specific heat
    the heat required to raise the temperature of one gram of a substance one degree centigrade
    heat of condensation
    heat liberated by a unit mass of gas at its boiling point as it condenses into a liquid
    heat of fusion
    heat absorbed by a unit mass of a solid at its melting point in order to convert the solid into a liquid at the same temperature
    heat of solidification
    heat liberated by a unit mass of liquid at its freezing point when it solidifies
    heat of sublimation
    heat absorbed by a unit mass of material when it changes from a solid to a gaseous state
    heat of vaporisation, heat of vaporization
    heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature
    type of:
    energy, free energy
    (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs
  2. noun
    the sensation caused by heat energy
    synonyms: warmth
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    type of:
    temperature
    the somatic sensation of cold or heat
  3. noun
    the presence of heat
    synonyms: high temperature, hotness
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    Antonyms:
    cold, coldness, frigidity, frigidness, low temperature
    the absence of heat
    types:
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    calefaction, incalescence
    the property of being warming
    fieriness, red heat
    the heat or the color of fire
    torridity
    extreme heat
    warmness, warmth
    the quality of having a moderate degree of heat
    white heat
    the hotness of something heated until it turns white
    lukewarmness, tepidity, tepidness
    a warmness resembling the temperature of the skin
    type of:
    temperature
    the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)
  4. noun
    utility to warm a building
    synonyms: heating, heating plant, heating system
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    types:
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    central heating
    a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiators
    gas heat
    heating system that burns natural gas
    panel heating
    heating system consisting of wall or floor or baseboard or ceiling panels containing electric conductors or heating pipes
    steam heat, steam heating
    a heating system in which steam is generated in boilers and piped to radiators
    type of:
    utility
    a facility composed of one or more pieces of equipment connected to or part of a structure and designed to provide a service such as heat or electricity or water or sewage disposal
  5. verb
    make hot or hotter
    “the sun heats the oceans”
    heat the water on the stove”
    synonyms: heat up
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    Antonyms:
    chill, cool, cool down
    make cool or cooler
    types:
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    crisp, crispen, toast
    make brown and crisp by heating
    scald
    heat to the boiling point
    soak
    heat a metal prior to working it
    calcine
    heat a substance so that it oxidizes or reduces
    preheat
    heat beforehand
    overheat
    make excessively or undesirably hot
    scorch, sear
    make very hot and dry
    bake, broil
    heat by a natural force
    reheat
    heat again
    sizzle
    burn or sear with a sizzling sound
    type of:
    alter, change, modify
    cause to change; make different; cause a transformation
  6. verb
    provide with heat
    heat the house”
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    types:
    steam-heat
    heat by means of steam
    type of:
    furnish, provide, render, supply
    give something useful or necessary to
  7. verb
    gain heat or get hot
    “The room heated up quickly”
    synonyms: heat up, hot up
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    Antonyms:
    chill, cool, cool down
    loose heat
    types:
    overheat
    get excessively and undesirably hot
    fry
    be excessively hot
    type of:
    change state, turn
    undergo a transformation or a change of position or action
  8. noun
    the trait of being intensely emotional
    synonyms: passion, warmth
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    types:
    fieriness
    a passionate and quick-tempered nature
    type of:
    emotionalism, emotionality
    emotional nature or quality
  9. noun
    applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
    synonyms: estrus, oestrus, rut
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    Antonyms:
    anestrum, anestrus, anoestrum, anoestrus
    applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus
    type of:
    physical condition, physiological condition, physiological state
    the condition or state of the body or bodily functions
  10. verb
    arouse or excite feelings and passions
    synonyms: fire up, ignite, inflame, stir up, wake
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    types:
    ferment
    work up into agitation or excitement
    type of:
    arouse, elicit, enkindle, evoke, fire, kindle, pique, provoke, raise
    call forth (emotions, feelings, and responses)
  11. noun
    a preliminary race in which the winner advances to a more important race
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    type of:
    race
    a contest of speed
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