Salty. In cooking, briny means salty or relating to salt water.
Brining is a cooking technique that involves soaking meat in a saltwater solution before cooking. The saltwater solution, or brine, adds flavor and moisture to the meat through osmosis. The basic ratio for a wet brine is one cup of kosher salt to one gallon of water. You can also add other ingredients to the brine, such as garlic, peppercorn, citrus, honey, or brown sugar. The meat is then soaked in the brine for 30 minutes to several days.
Brine can also refer to the saltwater solution used to preserve capers. The brine usually includes vinegar, which helps to preserve the capers and gives them a sharp flavor.
Sources:
https://www.epicurious.com/shopping/what-are-capers-a-guide-to-the-punchy-briny-ingredient-every-pantry-need
https://food52.com/blog/10405-how-to-brine-meat-and-why-you-should-bother
https://www.vocabulary.com/dictionary/briny
