White list. (a) A list of business concerns regarded as worthy of patronage by reason of compliance with certain conditions, as in regard to treatment of employees; as, the white list of the Consumers' League. [Cant] (b) (New York Stock Exchange) The official list of all transactions, published daily on white paper, divided into sales from 10 to 12, 12 to 2, and 2 to 3.

White list. (a) A list of business concerns regarded as worthy of patronage by reason of compliance with certain conditions, as in regard to treatment of employees; as, the white list of the Consumers' League. [Cant] (b) (New York Stock Exchange) The official list of all transactions, published daily on white paper, divided into sales from 10 to 12, 12 to 2, and 2 to 3.

• A list or collection of people or entities that are known, trusted, or explicitly permitted.
  
• To place on a whitelist; to mark or note a person or entity as trustworthy or acceptable.
       The email program allows you to whitelist email from known sources.