rare/rɛr; reə/adj 1 not happening often, or not common [ common ] 不常发生的﹔稀有的﹐罕见的: a disease that is very rare among children 在儿童中非常罕见的一种疾病rare plants such as orchids 兰花等稀有植物it is rare (for sb/sth) to do sth It is very rare for her to miss a day at school. 她上课很少缺席。2 meat that is rare has only been cooked for a short time and is still red〔肉〕一两成熟的