Adjective sidelong has 3 senses
  1. askance, askant, asquint, squint, squint-eyed, squinty, sidelong - (used especially of glances) directed to one side with or as if with doubt or suspicion or envy; "her eyes with their misted askance look"- Elizabeth Bowen; "sidelong glances"
    Antonym: direct (indirect, via indirect)
  2. lateral, sidelong - situated at or extending to the side; "the lateral branches of a tree"; "shot out sidelong boughs"- Tennyson
    Antonym: top (indirect, via bottom, side)
    Antonym: bottom (indirect, via side, top)
  3. sidelong - inclining or directed to one side; "moved downward in a sidelong way" - Bram Stoker
    horizontal (indirect, via vertical, inclined)
    Antonyms: vertical, perpendicular (indirect, via inclined, horizontal)
,Adverbial sidelong has 3 senses
  1. sidelong - on the side; "the plow lay sidelong on the ground"
  2. sidelong - with the side toward someone or something; "seated sidelong to the window"- Nathaniel Hawthorne
  3. sidelong, sideways, obliquely - to, toward or at one side; "darting eyes looking sidelong out of a wizened face"