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interpersonal

[in-ter-pur-suh-nl]
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adjective
  1. of or pertaining to the relations between persons: He has strong interpersonal skills.
  2. existing or occurring between persons.
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Origin of interpersonal

First recorded in 1835–45; inter- + personal
Related formsin·ter·per·son·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for interpersonally

interpersonal

adjective
  1. between persons; involving personal relationships
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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

Word Origin and History for interpersonally

interpersonal

adj.

1842, from inter- + personal. Introduced in a psychological sense 1938 by H.S. Sullivan (1892-1949) to describe "behavior between people in an encounter."

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Online Etymology Dictionary, © 2010 Douglas Harper