The word covert has multiple meanings, depending on its context.
1) In a general sense, it can refer to something that is hidden or concealed from view, often due to being intentionally obscured or kept out of sight. For example, one might say "the spy's covert operations were meant to remain undetected."
2) Covert can also be used in a more specific sense when referring to an undercover operation, where someone is pretending to be something they are not for the purpose of gathering information or enforcing laws. For example, "the police conducted a successful covert operation to bust a drug ring."
3) In some cases, covert can refer to something that is subtle or indirect, rather than overt or direct. This usage often implies an attempt to avoid drawing attention to oneself or one's actions. For example, "the politician used covert tactics to sway the voters in his favor."