Definition of "Sidelong" :

adjective: (used especially of glances) directed to one side with or as if with doubt or suspicion or envy

"Sidelong glances."

adjective: inclining or directed to one side

"Moved downward in a sidelong way."

adjective: situated at or extending to the side

"Shot out sidelong boughs."

adverb: to, toward or at one side

"Darting eyes looking sidelong out of a wizened face."

adverb: with the side toward someone or something

"Seated sidelong to the window."

adverb: on the side

"The plow lay sidelong on the ground."