The Collaborative International Dictionary of English v.0.48:
zine \zine\, 'zine \'zine\(z[=e]n), n. [shortened from
A publication similar to a magazine but in electronic
rather than printed form, maintained as data files on a
computer and accessible via the world wide web; sometimes
called e-zine ("e" standing for electronic, as in e-mail.
The Free On-line Dictionary of Computing (18 March 2015):
(e-zine) A regular
publication on some particular topic distributed in digital
form, chiefly now via the web but also by
electronic mail or floppy disk. E-zines are often
distributed for free by enthusiasts.