Definition of "stereophonic" [stereophonic]

• Of or used in a sound-reproduction system that uses two or more separate channels to give a more natural distribution of sound. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I squatted on my haunches, close to the action, soaking up those terrific sounds (recorded in a process not yet widely known as "stereophonic")."
• "Binaural tones are a special kind of stereophonic sound that incorporates two tones which are of two different frequencies for brainwave entrainment."
• "With just a few notes of music, the secret that I have kept hidden for nearly four decades returned to my mind in vivid stereophonic sound."