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or tri-state

[trahy-steyt] /ˈtraɪˌsteɪt/
pertaining to a territory made up of three adjoining states:
a tristate league.
pertaining to the three adjoining parts of such states:
the tristate region of Missouri, Kansas, and Nebraska.
Origin of tristate Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for tri state


(of a digital computer chip) having high, low, and floating output states
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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tri state in Technology

A feature of some digital electronic devices which allows a connector (pin) to either act as a normal output, driving a signal onto a line, or to be "tri stated" - set to a high-impedance ("high Z") condition. This allows other outputs to drive signals onto the line. Often the same connector also functions as an input when its output circuitry is tri stated.
Tri-state outputs are typically used for the connection of several digital circuits to a shared bus onto which any one of them may output data for the others to input.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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