What's Call Rejected Mean?

In many voice telephone networks, anonymous call rejection is a calling feature implemented in software on the network that automatically screens out calls from callers who have blocked their caller ID information.

What does it mean when the phone says call Rejected?

“If it rings only one or two times and goes to voicemail then your call is probably declined (the recipient has manually clicked the “decline” button).” ... “If you make a phone call and it goes directly to voicemail can be a sign that the person you called turned their phone off, or their battery died,” says Hartwig.

Is call reject the same as blocking?

I would imagine the Reject list notifies you about the call but it gets rejected automatically (the caller gets a busy signal/message). The Block list would not even bother to tell you they're calling (the caller would just get no answer at all). Block generally means they cannot call you and you cannot call them.