1. [adv]  to toward or at one side; "darting eyes looking sidelong out of a wizened face"
2. [adv]  with the side toward someone or something; "seated sidelong to the window"- Nathaniel Hawthorne
3. [adv]  on the side; "the plow lay sidelong on the ground"
4. [adj]  (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"
5. [adj]  inclining or directed to one side; "moved downward in a sidelong way" - Bram Stoker
6. [adj]  situated at or extending to the side; "the lateral branches of a tree"; "shot out sidelong boughs"- Tennyson

Sidelong
Sidelong

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1. \Side"long`\, adv. [See {Sideling}, adv.]
   1. Laterally; obliquely; in the direction of the side.
   2. On the side; as, to lay a thing sidelong.
   Note: [See {Sideling}, adv. ] --Evelyn.
   

2. \Side"long`\, a.
   Lateral; oblique; not being directly in front; as, a sidelong
   glance.
         The bashful virgin's sidelong looks of love.
                                                  --Goldsmith.