Definition

noun

A liquid (often thickened) condiment or accompaniment to food.
“apple sauce; mint sauce”
Tomato sauce (similar to US tomato ketchup), as in:
“[meat] pie and [tomato] sauce”
(usually “the”) Alcohol, booze.
“Maybe you should lay off the sauce.”

verb

To add sauce to; to season.
To cause to relish anything, as if with a sauce; to tickle or gratify, as the palate; to please; to stimulate.
To make poignant; to give zest, flavour or interest to; to set off; to vary and render attractive.

noun

The person, place or thing from which something (information, goods, etc.) comes or is acquired.
“The accused refused to reveal the source of the illegal drugs she was selling.”
Spring; fountainhead; wellhead; any collection of water on or under the surface of the ground in which a stream originates.
“The main sources of the Euphrates River are the Karasu and Murat Rivers.”
A reporter's informant.