Also found in: Wikipedia.
en·dashor en dash (ĕn′dăsh′)
A symbol ( - ) used in writing or printing to connect continuing or inclusive numbers or to connect elements of a compound adjective when either of the elements is an open compound, as 1880-1945 or Princeton-New York trains.
[From its being the width of an n in printing.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.