heat heat /ˈhiːt/

noun

1. () A form of energy that is transferred by a difference in temperature  ( heat energy , heat )
   a form of energy that is transferred by a difference in temperature
     The scorching heat made it unbearable to be outside for too long.
   The scorching heat made it unbearable to be outside for too long.
   
   
2. () The presence of heat  ( hotness , high temperature , heat )
   the presence of heat
     The heat of the sun warmed their skin as they lounged on the beach.
   The heat of the sun warmed their skin as they lounged on the beach.
   
   
3. () The sensation caused by heat energy  ( warmth , heat )
   the sensation caused by heat energy
    The heat from the sun made the day feel even hotter.
   The heat from the sun made the day feel even hotter.
   
   
4. () The trait of being intensely emotional  ( warmth , heat , passion )
   the trait of being intensely emotional
   
5. () Applies to nonhuman mammals: a state or period of heightened sexual arousal and activity  ( estrus [ N. American] , oestrus [British] , rut , heat )
   applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
   
   
6. Utility to warm a building  ( heat , heating , heating plant , heating system )
   utility to warm a building
    The heating system wasn't working
   the heating system wasn't working
    They have radiant heating
   they have radiant heating
   
   
7. A preliminary race in which the winner advances to a more important race  ( heat )
   a preliminary race in which the winner advances to a more important race
   

verb

1. () Make hot or hotter  ( heat up , heat )
   make hot or hotter
    The sun heats the oceans
   the sun heats the oceans
    Heat the water on the stove
   heat the water on the stove
   
2. Gain heat or get hot  ( heat , hot up [Informal, British] , heat up )
   gain heat or get hot
    The room heated up quickly
   The room heated up quickly
   
3. Arouse or excite feelings and passions  ( fire up , heat , inflame , ignite , stir up , wake )
   arouse or excite feelings and passions
    The ostentatious way of living of the rich ignites the hatred of the poor
   The ostentatious way of living of the rich ignites the hatred of the poor
    The refugees' fate stirred up compassion around the world
   The refugees' fate stirred up compassion around the world
    Wake old feelings of hatred
   Wake old feelings of hatred
   
4. Provide with heat  ( heat )
   provide with heat
    Heat the house
   heat the house
   

 nova nova /ˈnoʊvə/

noun

1. A star that ejects some of its material in the form of a cloud and becomes more luminous in the process  ( nova )
   a star that ejects some of its material in the form of a cloud and becomes more luminous in the process
    The sudden brightness in the sky indicated the birth of a nova.
   The sudden brightness in the sky indicated the birth of a nova.
   
   

 white fir white fir /waɪt fɜːr/

noun

1. Medium to tall fir of western North America having a conic crown and branches in tiers; leaves smell of orange when crushed  ( Abies amabilis , amabilis fir , Christmas tree , Pacific silver fir , red silver fir , white fir )
   medium to tall fir of western North America having a conic crown and branches in tiers; leaves smell of orange when crushed
   
   
2. Medium to tall fir of central to western United States having a narrow erect crown and soft wood  ( Abies concolor , Abies lowiana , California white fir , Colorado fir , white fir )
   medium to tall fir of central to western United States having a narrow erect crown and soft wood
   
   

 Claudius Ptolemaeus Claudius Ptolemaeus /ˈklɔːdiəs tɒlɪˈmiːəs/

noun

1. Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance  ( Claudius Ptolemaeus , Ptolemy )
   Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance