1. 英语字母表的第5个字母
E is the fifth letter of the English alphabet.

2. C大调音阶中的第三音;E音
In music, E is the third note in the scale of C major.

3. (用于首字母为e的一些单词的缩写，如English, east和 earstern)
E or e is an abbreviation for words beginning with e, such as 'English', 'east', and 'eastern'.

4. 迷幻药;迷幻药片
E is the drug ecstasy, or a tablet of ecstasy.