At Signeasy, an envelope is a wrapper for documents that you send to a recipient to sign. An envelope can have one document or many documents, and one signer or many signers. Envelopes have statuses (i.e. sent, completed, voided) and also contain information about the sender and timestamps that indicate the progress of the delivery procedure.
Envelopes help you better manage the documents that are usually sent together and need to be signed together to complete a deal, an onboarding process, contract, etc.
Regardless of how many documents, fields, and signers a given envelope contains, it still counts as only one.