Etymology
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broadband (n.)

from 1620s in various senses, from broad (adj.) + band (n.1). In electronics from 1956 as "a band having a wide range of frequencies;" as a type of high-speed internet access, it was widely available from 2006.

updated on August 07, 2017

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Definitions of broadband from WordNet

broadband (adj.)
of or relating to or being a communications network in which the bandwidth can be divided and shared by multiple simultaneous signals (as for voice or data or video);
broadband (adj.)
responding to or operating at a wide band of frequencies;
a broadband antenna
Synonyms: wideband
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.