Definition of "menacingly"

Food, more and better, was placed near her - but, dumb and motionless, she lay with her face turned to the wall, and her dog growled menacingly at the stranger.

1902, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Bush Studies (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 19

Thor glared at him [...] what little light there was in the place mustered its forces briefly to glint menacingly off the horns of his helmet.

1982, Douglas Adams, Life, the Universe and Everything, page 110