There are 5 main definitions of e in English:

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e 1

Pronunciation: /iː/

symbol

1 () Euro or euros.
2 (also e) Chemistry An electron.
3 (e) Mathematics The transcendental number that is the base of Napierian or natural logarithms, approximately equal to 2.71828.
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There are 5 main definitions of e in English:

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E 2

Pronunciation: /iː/
(also e)

noun (plural Es or E's)

1The fifth letter of the alphabet.
1.1Denoting the fifth in a set of items, categories, sizes, etc.
1.2The fifth-highest class of academic mark: in O level about half of those entered obtained D or E grades
1.3 (e) Chess Denoting the fifth file from the left, as viewed from White’s side of the board.
1.4Denoting the lowest-earning socio-economic category for marketing purposes.
2 (E) A shape like that of a capital E: [in combination]: an E-shaped stately home
3 (E) Music The third note of the diatonic scale of C major.
3.1A key based on a scale with E as its keynote.
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There are 5 main definitions of e in English:

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E 3

Pronunciation: /iː/

abbreviation

1East or Eastern: 139° E
2 informal The drug Ecstasy or a tablet of Ecstasy: people have died after taking E being busted with three Es can lead to stiff penalties
3 [in combination] Denoting products, in particular food additives, which comply with EU regulations: the yellow colouring tartrazine (E 102) See also E-number.
4 [in combination] (In units of measurement) exa- (1018).
5Spain (international vehicle registration).
From Spanish España

symbol

Physics
1Electric field strength.
3Energy: E = mc2

Phrases

the three Es

Economy, efficiency, and effectiveness: the research unit examines the effect of the three Es in the provision of social services
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There are 5 main definitions of e in English:

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E 4

Pronunciation: /ē/

Entry from US English dictionary

symbol

() Euro(s).
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There are 5 main definitions of e in English:

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e- 5

Pronunciation: /iː/

prefix

Denoting something in electronic form, especially the use of electronic data transfer for information exchange and financial transactions via the Internet: e-cash e-business e-zine

Origin

From electronic, on the pattern of email.

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