To part with unintentionally; forfeit; mislay; be deprived of; miss; squander; waste.
LOSER.
Yes; he would do that, even though he should lose Julia also. – The Claverings by Anthony Trollope
I cannot marry thee, And must I lose thee? – The Love-Chase by James Sheridan Knowles
So there's no time to lose. – The Rustle of Silk by Cosmo Hamilton