1
- a long-bodied chiefly marine fish with a cartilaginous skeleton, a prominent dorsal fin, and tooth-like scales. Most sharks are predatory, though the largest kinds feed on plankton, and some can grow to a large size.鲨, 鲛。
1.1
- Several orders (or superorders) of the subclass Elasmobranchii: many families.板鳃亚纲中数目（或数总目）：多科。
2
- a small SE Asian freshwater fish with a shark-like tail, popular in aquaria鲨尾鱼。
2.1
- Two species in the family Cyprinidae: the small red-tailed black shark (Labeo bicolor), and the larger black shark (Morulius chrysophekadion).鲤科中两种：较小的红尾黑鲨（拉丁名Labeo bicolor）, 较大的黑鲨（拉丁名Morulius chrysophekadion）。
3
- a light greyish-brown European moth, the male of which has pale silvery hindwings冬夜蛾。
3.1
- Genus Cucullia, family Noctuidae: several species, including the shark (C. umbratica).冬夜蛾属, 夜蛾科：数种, 包括蛰居冬夜蛾（拉丁名C. umbratica）。
no obj.
- Brit. informal (typically of a man at a social gathering) be in active pursuit of a sexual partner〈英, 非正式〉（多指男子在社交场合中）努力追逐性伴侣：
as soon as he arrived he was sharking among the women.
他一到, 就在女士中寻找追逐的对象。
词源
late Middle English:of unknown origin.
informal <非正式>
1
- a person who unscrupulously exploits or swindles others贪婪狡猾的人; 敲诈勒索者; 骗子：
Coleby was a shark, not the sort of man to pay more when he could pay less
科尔比是一个贪婪狡猾的人, 可以少付钱时决不会多付
with modifier property sharks want to develop 200 acres around the site.那些贪婪狡猾的房地产开发商想在那块地周围开发200英亩土地。参见LOAN SHARK.
2
- US an expert in a specified field〈美〉能手, 专家：
a poor shark.
一位可怜的专家。
词源
late 16th cent.: perhaps from German Schurke 'worthless rogue', influenced by SHARK1.