Also found in: Wikipedia.
adv. & adj. Music
In a mournful or plaintive manner. Used chiefly as a direction.
[Italian, from Latin dolōrōsus, dolorous; see dolorous.]
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.
(Classical Music) music (to be performed) in a sorrowful manner
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014