envelope

== English == === Etymology 1 === From French enveloppe. The engineering sense is derived from flight envelope. The verb is from the noun. ==== Pronunciation ==== (Received Pronunciation) IPA(key): /ˈɛnvə(ˌ)ləʊp/, /ˈɒnvə(ˌ)ləʊp/, (chiefly a wrapping) /ˈɒnvləʊp/, /ˈɑ̃və(ˌ)ləʊp/, /ˈɒnvə(ˌ)ləʊp/ (General American) enPR: ĕn′vəlōp', än′vəlōp', IPA(key): /ˈɛnvə(ˌ)loʊp/, /ˈɑn-/ Hyphenation: en‧vel‧ope ==== Noun ==== envelope (plural envelopes) A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing. Something that envelops; a wrapping. Synonym: wrapper A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship. Synonym: gasbag (geometry) A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects. (electronics) A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics. (music) The shape of a sound, which may be controlled by a synthesizer or sampler. (networking) The information used for routing a message that is transmitted with the message but not part of its contents. Synonym: header (biology) An enclosing structure or cover, such as a membrane; a space between two membranes (engineering) The set of limitations within which a technological system can perform safely and effectively. push the envelope (astronomy) The nebulous covering of the head or nucleus of a comet; a coma. An earthwork in the form of a single parapet or a small rampart, sometimes raised in the ditch and sometimes beyond it. ===== Derived terms ===== ===== Translations ===== ==== Verb ==== envelope (third-person singular simple present envelopes, present participle enveloping, simple past and past participle enveloped) (transitive, rare) To put (something) in an envelope. ==== See also ==== Wikipedia article on envelopes used for mailing Wikipedia article on envelopes in geometry ✉ === Etymology 2 === See envelop. ==== Pronunciation ==== enPR: ĕn-vĕl'əp, IPA(key): /ɛnˈvɛləp/ for audio, see envelop ==== Verb ==== envelope (third-person singular simple present envelopes, present participle enveloping, simple past and past participle enveloped) Archaic form of envelop. === References === == Portuguese == === Etymology === Borrowed from French enveloppe, from envelopper. === Pronunciation === Hyphenation: en‧ve‧lo‧pe === Noun === envelope m (plural envelopes) envelope === Verb === envelope inflection of envelopar: first/third-person singular present subjunctive third-person singular imperative === Further reading === “envelope”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026 “envelope”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026