Envelope
Part of speech: noun
Definition: A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing. Something that envelops; a wrapping A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects. A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics. The shape of a sound, which may be controlled by a synthesizer or sampler. The information used for routing an email that is transmitted with the email but not part of its contents. An enclosing structure or cover, such as a membrane. The set of limitations within which a technological system can perform safely and effectively.
Superscribe
Part of speech: verb
Definition: to write on the exterior of, the surface of, or above.to write (something) on the exterior of an object, such as a document or an envelope.To address (an envelope etc.).