Main definitions of e in US English:

: e1E2E3

e1

  • 1"€"Euro or euros.

  • 2also "e−"Chemistry
    An electron.

  • 3"e"Mathematics
    The transcendental number that is the base of Napierian or natural logarithms, approximately equal to 2.71828.

Pronunciation

e

/i//ē/

Main definitions of e in US English:

: e1E2E3

E2

  • 1Earth.

  • 2East or Eastern.

    ‘139° E’
  • 3Easter.

  • 4informal The drug Ecstasy or a tablet of Ecstasy.

  • 5Engineer or engineering.

  • 6English.

  • 7in combination Electronic.

    ‘E-commerce’

Main definitions of e in US English:

: e1E2E3

E3

(also e)

noun

  • 1The fifth letter of the alphabet.

    1. 1.1 Denoting the fifth in a set of items, categories, sizes, etc.
    2. 1.2"e"Chess Denoting the fifth file from the left, as viewed from White's side of the board.
    3. 1.3 Denoting the lowest-earning socioeconomic category for marketing purposes.
  • 2"E"A shape like that of a capital E.

    in combination ‘an E-shaped stately home’
  • 3usually "E"Music
    The third note of the diatonic scale of C major.

    1. 3.1 A key based on a scale with E as its keynote.

Physics
  • 1Electric field strength.

  • 2Electromotive force.

  • 3Energy.

    ‘E = mc²’

Pronunciation

E

/i//ē/