Wiktionary
n. A tangy condiment, usually containing a variety of flavorings, designed to accompany steak.
WordNet
n. pungent bottled sauce for steak
Wikipedia
Steak sauce is a dark brown sauce commonly served as a condiment for beef, in the United States. The original sauce from which "steak sauce" is derived is known in Britain as " brown sauce". Steak sauce is also derived from "brown sauce" in Japan, called tonkatsu sauce, which has a slight variation in ingredients.
Usage examples of "steak sauce".
Content, I juggled the salad, a bottle of dressing, and the steak sauce and backed out the screen door.
Just a nice little powder in the damn fool's steak sauce, and he becomes silly enough to buy the damn bonds.
There was a jug of water and five glasses, salt and pepper, bottles of steak sauce.
He set out salad dressing, sour cream, and steak sauce, shut the broiler off, and wiped his hands on a kitchen towel.
The army might go into battle in worn boots and frayed uniforms and with worn-out equipment, but by God, they were Americans, and where they went, so did Heinz 57 steak sauce, Tabasco, catsup, and a hot plate.