use before

use something before something

1. to consume or use something before using something else. Use this jar before that one. This one is older. I used the old one before the one you just bought.
2. to consume or use something before a specified date. I will use this bottle of catsup before May. You should use this one before the date stamped on the bottom.
See also: before, use
References in periodicals archive ?
In contrast to food additives, colors in use before the legislation were allowed continued use only if they underwent further testing to confirm their safety.
Federal regulations require evidence that each substance is safe at its intended level of use before it may be added to foods.