frost /frɔst/ n. 1.［u］霜：The grass was covered with frost in the early morning. 清晨草上盖满了霜。 2.［u］霜冻，严寒(零下气候): Frost has killed several of our new young plants. 霜冻把我们刚种的几棵植物冻死了。 3.［c］(一般)霜冻天气: We may have a frost tonight, so cover your tomato plants. 今夜可能要下霜，把你的西红柿苗盖起来吧。