- [countable]
the whole of the eye, including the round part inside the head that cannot be seen 眼球；眼珠 
- eyeballs [plural](informal)
used to refer to the number of people who visit a website, watch a television programme, read a magazine, etc., especially when considering how much money they may bring in 眼球： 用来指访问网站，观看电视节目，阅读杂志等的人数，尤其是考虑到他们可以带来多少收入时It's a sad fact that bad news grabs more eyeballs than good news. 不幸的是，坏消息比好消息更能吸引眼球。
Idioms
be drugged up to the eyeballs
- (informal)
to have taken or been given a lot of drugs 已服用大量毒品
be up to your eyeballs in something
eyeball to eyeball (with somebody)