the first person to become aware that a particular place or thing exists (第一个)发现 Sir Alexander Fleming, the discoverer of penicillin 盘尼西林的发现者亚历山大·弗莱明爵士
a person who finds somebody/something that was hidden or that they did not expect to find (出乎意料地)发现,找到,发觉 I was the lucky discoverer of a very valuable painting. 我幸运地发现了一幅非常珍贵的画。