(espionage, military) A name used to clandestinely identify somebody or something for confidentiality.

Cloth for making covert-coats.

plural of covert-coating

(finance) To buy in such stocks as have been sold short, in order to meet one's engagements, etc.

plural of covert channel

(computing) A means of transferring information objects between processes that are not supposed to be allowed to communicate according to the security policy.

covered with a layer of ice, e.g. water; frozen over

plural of covenantalist

covenantalism

(theology) An interpretive framework for the Bible, viewing the history (and future) of God's dealings with humankind through the lens of the various covenants described in the Scriptures.