1) ADV: ADV after v Sideways means from or towards the side of something or someone.
Piercey glanced sideways at her...
The ladder blew sideways...
He was facing sideways.ADJ-GRADED: ADJ nSideways is also an adjective.
Alfred shot him a sideways glance.2) ADV: ADV after v If you are moved sideways at work, you move to another job at the same level as your old job.
He would be moved sideways, rather than demoted.ADJ: ADJ nSideways is also an adjective.
...her recent sideways move.3) PHRASE: V inflects If you are knocked sideways by something, it makes you feel very surprised, confused, or upset. [INFORMAL]
He was knocked sideways by the result...
A week ago I met my ex-boyfriend and it knocked us both sideways.
English dictionary. 2008.