verb - (usually in passive) to cover something, especially to protect it (e.g. with a layer of material like metal, plastic, etc.)
noun - the quality of being dark, gloomy, or hard to see through; the quality of being unclear or difficult to understand
noun - the police and other people whose job is to make sure that laws are followed and to protect the public
verb, formal - to announce or proclaim something, especially in a formal or ceremonial way; to signal the arrival or beginning of something
noun, technical - information used to authenticate a user, such as a username and password, that allows access to a system or service