Cry
As with most common verbs, the spiritual meaning of “crying” or “crying out” (meaning a shout or wail, not weeping) is highly dependent on context. Who is crying out? To whom? Why? In most cases, though, crying has to do with speaking falsely, and of the emotions arising from the conflict between truth and falsity. When people cry out in distress it is most often an indication that they are being overwhelmed by false ideas. In other cases – especially regarding more joyful cries – it is a celebration of the triumph of truth.
Revelation 20:4-5
4
I saw thrones, and they sat on them, and judgment was given to them. I saw the souls of those who had been beheaded for the testimony of Jesus, and for the word of God, and such as didn't worship the beast nor his image, and didn't receive the mark on their forehead and on their hand. They lived, and reigned with Christ for a thousand years.
5
The rest of the dead didn't live until the thousand years were finished. This is the first resurrection.