Ma-bell definitions

A slang term referring to AT&T Corp., which provided the original telephone service in the United States, and thus was considered the “mother” of the telecom industry. It is no longer commonly used.
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The common nickname for the Bell Telephone Company when it was the monopoly communications provider in the U.S. See Bell System.
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(US, telecommunications, informal, historical) Collectively, the family of companies associated with American Telephone & Telegraph, providing telephone service in the United States for many years through 1983.
pronoun
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