1. [adv]  toward one side; "the car slipped sideways into the ditch"; "leaning sideways"; "a figure moving sidewise in the shadows"
2. [adv]  from the side; obliquely; "a picture lit sideways"; "scenes viewed sidewise"
3. [adv]  with one side forward or to the front; "turned sideways to show the profile"; "crabs seeming to walk sidewise"

SIDEWAY is a 7 letter word that starts with S.