(also e )
■ noun ( plural 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.
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- (10 18 ).
5》 Spain (international vehicle registration). [from Sp. España .]
■ symbol Physics
1》 electric field strength.