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.
A very thin fissure.
very thin, as thin as a hair
To choose one or more elements of a set, especially a set of options.
To obtain a set of data from a database using a query.
Privileged, specially selected.
Of high quality; top-notch.