What is the meaning of Sweater?

A knitted jacket or jersey, usually of thick wool, worn by athletes before or after exercise.

A similar garment worn for warmth.

One who sweats (produces sweat).

One who or that which causes to sweat.

A diaphoretic remedy.

An exploitative middleman who subcontracted piece work in the tailoring trade.

One who sweats coins, i.e. removes small portions by shaking them.

A London street ruffian in Queen Anne's time who prodded passers-by with his sword-point.

To dress in a sweater.

sweater, sweatshirt

Source: wiktionary.org