Definition of ISDN in English:

ISDN

Line breaks: ISDN
Pronunciation: /ʌɪɛsdiːˈɛn
 
/

abbreviation

Integrated services digital network.

Definition of ISDN in:

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Word of the day antebellum
Pronunciation: ˌantɪˈbɛləm
adjective
occurring or existing before a particular war…