spac ‧ ing /ˈspeɪsɪŋ/ BrE AmE noun [uncountable]
the amount of space between the printed letters, words, or lines on a page
single spacing (=lines with no empty lines between them)
double spacing (=lines with one empty line after each one)
spac ‧ ing /ˈspeɪsɪŋ/ BrE AmE noun [uncountable]
the amount of space between the printed letters, words, or lines on a page
single spacing (=lines with no empty lines between them)
double spacing (=lines with one empty line after each one)
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012