A very thin fissure.
A fishing line made from hair.
The line along one's forehead where hair starts growing.
A very thin line in writing, drawing, or typography.
very thin, as thin as a hair
The portion of a coalfield out for working.
The money, etc., gained by success in competition or contest, especially in gambling.
The act of obtaining something, as in a contest or by competition.
A new opening.
That constitutes a win.
Attractive.
That leads to success.