Forms adjectives describing position next to or alongside an object. / Forms adjectives and adverbs describing position in relation to a dividing line or other separation.

(rare, nonstandard) Of or relating to the side (of something); lateral.

(rare, nonstandard) To the side; sideways; laterally; sideling; obliquely; indirectly.

Separate from the main course of a meal. / Supplementary or in addition to one's usual job or income. / Additional, surreptitious; often with a connotation of dishonesty, illegality or adultery.

(geography, historical) An ancient city on a small peninsula on the Mediterranean coast of Anatolia, settled by Greeks from Cyme.

present participle of side with

simple past tense and past participle of side with

Alternative form of onside

(Christianity, LGBT) The position of Christians who believe that homosexuality and gay marriage are blessed by God and should not be treated differently from traditional heterosexual marriage.

(idiomatic) To ally oneself with a given opinion, agenda or group; to support one side or viewpoint in a competition or confrontation.