Definition of e- in English:

e-

Syllabification: e-

prefix

(also E-) Denoting anything in an electronic state, especially the use of electronic data transfer in cyberspace for information exchange and financial transactions, especially through the Internet: e-business e-cash e-world e-zine

Origin

from electronic, on the pattern of e-mail.

Definition of e- in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up