(in the workplace) To change duties without a change of pay and conditions.

A woman who (among others) has the potential to become one's wife, or who is fulfilling the role of one's wife in addition to one's actual wife; a concubine

(mining) the overhanging side of an inclined or hading vein

Alternative spelling of side dish

An entrance to building through its side.

Synonym of bat for the other team

plural of Siddall

A surname.

(slang) A man who is secretly dating a woman who is already in a more serious relationship

Alternative spelling of sidearm