"a line used for saving or preserving life."In other words, it's good to know it's there, but having to use it means you're in trouble. Now the new definition of a lifeline (or new to me, anyway):
a strand of fiber threaded through a row of a knitted project so that, if theI've heard that dental floss is recommended for this purpose. So I decided to use a lifeline in my first lace project: a square for an afghan. I knew that it would be best to use a thicker floss, so I went through the tiny floss containers from the dentist. Fine, extra fine, super fine... the only standard width floss I have is mint. So now I have minty-fresh lace. Eh! How can that be bad? Happily I never had to frog back to the lifeline, but it sure was nice to know it was there. Did I mention the minty-fresh part?
knitter gets lost or makes a mistake, can unravel back to that row and begin
from there, rather than the very start.