a person with whom one keeps up an exchange of letters, usually someone so far away that a personal meeting is unlikely: My niece in Texas has a pen pal in France.
Origin of pen pal
An Americanism dating back to 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a person with whom one regularly exchanges letters, often a person in another country whom one has not metAlso called: pen friend
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