E

Multiple Entries:
  E    e    e-    ex-  

Concise Oxford English Dictionary © 2008 Oxford University Press:
E1 (also e)

▶noun (pl. Es or E's)

• 1 the fifth letter of the alphabet.

• 2 denoting the fifth in a set.

• 3 Music the third note of the diatonic scale of C major.

Concise Oxford English Dictionary © 2008 Oxford University Press:
E2

▶abbreviation

• 1 East or Eastern.

• 2 informal the drug Ecstasy or a tablet of Ecstasy.

• 3 denoting products, in particular food additives, which comply with EU regulations. See also E-number.

• 4 exa- (10¹⁸).

• 5 Spain (international vehicle registration). [from Sp. España.]

▶symbol Physics

• 1 electric field strength.

• 2 energy.

Concise Oxford English Dictionary © 2008 Oxford University Press:
e/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.

Concise Oxford English Dictionary © 2008 Oxford University Press:
e-1

▶prefix variant spelling of ex-1 (as in elect, emit).

Concise Oxford English Dictionary © 2008 Oxford University Press:
e-2

▶prefix denoting the use of electronic data transfer, especially through the Internet: e-cash.

– origin from electronic, on the pattern of email.

Concise Oxford English Dictionary © 2008 Oxford University Press:
ex-1 (also e-; ef- before f)

▶prefix

• 1 out: exclude.

• 2 upward: extol.

• 3 thoroughly: excruciate.

• 4 denoting removal or release: excommunicate.

• 5 forming verbs which denote inducement of a state: exasperate.

• 6 denoting a former state: ex-husband.

– origin from L. ex ‘out of’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
ex-2

▶prefix out: exodus.

– origin from Gk ex ‘out of’.