WordWeb Online

1. Spatially or metaphorically from a higher to a lower level or position
   "prices plunged downward";
   - down, downwards, downwardly

1. Extending or moving from a higher to a lower place
   "the downward course of the stream";
   - down
    
2. On or toward a surface regarded as a base
   "he lay face downward"; "the downward pull of gravity"

See also: descending, down

Antonym: upward

Encyclopedia: Downward, Peter