(finance) The sector of the finance industry that assists investors and investing institutions in purchasing products from the sell side.

(finance) The sector of the finance industry that sells products such as stocks, bonds, and mutual funds to investors.

Alternative form of weakside

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.

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

Alternative spelling of sidearm

(informal, slang) A secondary job that brings in extra cash.