envelope
7 synonyms for envelope, grouped by meaning and by how common each one is.
Noun — A flat paper or cardboard cover used to hold and mail letters or documents.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
How to use envelope
The word patterns that sound natural to a native speaker.
push the envelope
seal an envelope
stamped envelope
Etymology
From French enveloppe. The "safe operating limits" sense grew out of the aviation phrase "flight envelope."
Full origin of envelope →Frequently asked questions
What does “envelope” mean?
The word “envelope” means a flat paper or cardboard cover used to hold and mail letters or documents. In plain terms, a paper wrapper for a letter — or, more abstractly, the outer boundary of what's safely possible.
How do you pronounce “envelope”?
“Envelope” is pronounced EHN-vuh-lohp (/ˈɛnvə(ˌ)loʊp/ in IPA).
How do you use “envelope” in a sentence?
Here is “envelope” used in a sentence: “She sealed the invitation inside a cream-colored envelope.”
What part of speech is “envelope”?
Depending on how it is used, “envelope” can be a noun and a verb.
Where does the word “envelope” come from?
The word “envelope” comes from French. From French enveloppe. The "safe operating limits" sense grew out of the aviation phrase "flight envelope.".
Is “envelope” a common word?
“Envelope” is a fairly common word in modern English, usually learned at around the A2 level.
How many meanings does “envelope” have?
“Envelope” has 3 distinct senses listed in this dictionary. The most common is: a flat paper or cardboard cover used to hold and mail letters or documents.
What is the difference between an envelope and a flight envelope?
In everyday use, an envelope is the paper cover used to mail letters and documents. In aviation and engineering, a "flight envelope" refers to the outer limits within which an aircraft or system can operate safely, such as maximum speed or altitude. The two senses share the idea of a boundary or covering but apply to very different contexts.
What does it mean to "push the envelope"?
This idiom comes from the technical meaning of envelope as the safe operating limits of a system, especially an aircraft. To push the envelope means to test or exceed normal boundaries of what is considered safe or acceptable, extending performance or behavior beyond established limits.
Can "envelope" be used as a verb?
Yes, as a verb it means to wrap something up completely, enclosing it on all sides. This usage is far less common than the noun form and is often confused with the closely related word "envelop," which is the standard spelling for the verb in modern English.
