"End-to-end encryption (E2EE) is a private communication system, only communicating users can participate, no adversary nor eavesdropper can interfere, not the communication system provider, telecom providers, Internet providers, nor malicious actors, only communicating users can access the cryptographic keys needed to converse"

TLS / HTTPS would be included in my definition; the purpose of which is that the two parties are the only ones that can see the traffic.