n. 25B6; adjective
a single red rose : ONE (ONLY), sole, lone, solitary, by itself/oneself, unaccompanied, alone.
she wrote down every single word : INDIVIDUAL, separate, distinct, particular.
is she single? : UNMARRIED, unwed, unwedded, unattached, free, a bachelor, a spinster; archaic sole.
double, married.
25A0; single someone/something out SELECT, pick out, choose, decide on; target, earmark, mark out, separate out, set apart/aside.