To roller skate with feet pointing in opposite directions.

Misspelling of one-sidedly.

Alternative form of sidelock

plural of side-lock

having flat sides / (US, colloquial) tall, or long and lank

(idiomatic) Fighting for or supporting that which is good, just, or benevolent.

(horsemanship) The left-hand side of a horse.

on the other hand; conversely

(education) An educator whose method is to provide students with occasional advice, assistance, and correction while allowing them to explore a subject area independently or by interacting among themselves; this educational method itself.

Having six sides.