Definition of "hawky"

He was a tall man with very powerful-looking shoulders, but his flesh seemed to sag thinly over his big frame; his face was thin, too, over a hawky nose and receding chin and gray hair.

1953, Mignon Good Eberhart, The unknown quantity

He had a hawky face with a high colour and eyes like slits of blue crystal, set in a web of fine lines. They were hard but not unkind.

1963, D'Arcy Niland, The shiralee