1. 温度;温暖;热度
    The warmth of something is the heat that it has or produces.

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    e.g. She went further into the room, drawn by the warmth of the fire...
           暖暖的炉火吸引着她继续向前走进那间屋子。
    e.g. June had brought with it the first of the summer warmth.
           六月带来了夏日的第一缕热气。

2. 保暖
    The warmth of something such as a garment or blanket is the protection that it gives you against the cold.

    e.g. The blanket will provide additional warmth and comfort in bed.
           毛毯能让你睡得更温暖、更舒适。

3. 热情;亲切；友好
    Someone who has warmth is friendly and enthusiastic in their behaviour towards other people.

    e.g. He greeted us both with warmth and affection.
           他热情且友好地迎接了我们俩。