/hi:t ||; hit/noun1 [U] the feeling of sth hot 热: This fire doesn't give out much heat. 这个暖炉热力不够。
2 [sing] (often with the 常与the连用) hot weather 炎热的天气: I like the English climate because I can't stand the heat. 我喜欢英国的气候，因为我怕热。
3 [sing] a thing that produces heat 产生热的物体: Remove the pan from the heat (= the hot part of the cooker). 把炉子上的锅拿下来。
4 [U] a state or time of anger or excitement 愤怒；激动: In the heat of the moment, she threatened to resign. 她在气头上扬言要辞职。
5 [C] one of the first parts of a race or competition. The winners of the heats compete against other winners until the final result is decided. 预赛
be on heat (used about some female animals) to be ready to have sex because it is the right time of the year （指某些雌性动物）发情