(informal) An assistant to another person, especially to a superior or more important person.

A one-wheeled attachment to the side of a motorcycle to allow for a separate seat for a passenger or cargo space. / A cocktail made with cognac (or brandy), triple sec liqueur, and lemon juice.

A line at the side of something. / Something that is additional or extra or that exists around the edges or margins of a main item.

(sports, transitive) To place on the sidelines; to bench or to keep someone out of play. / (transitive) To remove or keep out of circulation or out of the focus.

A note or notation made in a side margin. / A minor related mention, made as an aside, or afterthought.

(cricket) The side of the pitch on the same side as the batsman's legs as he takes his stance at the wicket; the left side for a right-handed batsman.

(cricket) The side of the pitch away from the batsman's legs as he takes his stance at the wicket; the right side for a right-handed batsman. / (horsemanship) The right-hand side of a horse.

(cricket) The leg side.

Alternative form of onside

Exceptionally funny; hilarious. / (of laughter) Intensely uncontrollable and genuine.