a piece of metal or other material, curved or bent back at an angle, for catching hold of or hanging things on.
a picture hook
a thing designed to catch people's attention.
companies are looking for a sales hook
a curved cutting instrument, especially as used for reaping or shearing.
He arranged two lines of men with flails, clubs, pitchforks, sickles, and reaping hooks .
a short swinging punch made with the elbow bent, especially in boxing.
a perfectly timed right hook to the chin
a curved stroke in handwriting, especially as made in learning to write.
Kurtz notes, ‘The small hooks at the end of the "t" and the "i" indicate a writer who is tenacious, holds on to beliefs, doctrines, ideals.’