# e

### Pronunciation

•  Audio (UK) (file)
•  Audio (UK) (file)
phoneme
• IPA (key): /ɛ/ or /iː/ or silent
letter name

## Noun

 LetterE or e

.

1. E is the fifth letter of the alphabet, and is the most common vowel and letter used in the English language.
"d" comes before "e"
2. (mathematics) The constant e is a real number that has formula ${\displaystyle \mathrm {e} =\lim _{n\to \infty }\left(1+{\frac {1}{n}}\right)^{n}}$ , and is approximately 2.718281828.