WordWeb Online

1. (used especially of glances) directed to one side with or as if with doubt or suspicion or envy
   "sidelong glances";
   - askance, askant, asquint, squint, squint-eyed, squinty
    
2. Situated at or extending to the side
   "shot out sidelong boughs";
   - lateral
    
3. Inclining or directed to one side
   "moved downward in a sidelong way"

1. On the side
   "the plough lay sidelong on the ground"
    
2. With the side toward someone or something
   "seated sidelong to the window"
    
3. To, toward or at one side
   "darting eyes looking sidelong out of a wizened face";
   - sideways, obliquely

See also: inclined, indirect, side