verb (used with object), sin·gle-spaced, sin·gle-spac·ing.
to type (copy) on each line space.
verb (used without object), sin·gle-spaced, sin·gle-spac·ing.
to type copy leaving no blank spaces between lines.
Origin of single-space
First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(tr) to type (copy) without leaving a space between the lines
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