to cry out: to call aloud in distress, alarm, or urgent appeal for help
This is a loud, involuntary cry wrung out of a person by pain, danger, injustice, or grief. It is not calm speech or a measured request; it is the shout of someone at the end of their strength, whether a man who has lost a blessing, a slave beaten by an overseer, or a nation crushed under an enemy.
The same cry runs in two directions. Pointed at other people, it is an outcry that demands attention and action: the wronged calling for justice, the desperate begging a king for relief. Pointed at God, it becomes the cry of prayer in trouble, and Scripture promises that God hears it. The two are not really separate words but one cry that reaches whoever can help.
What ties every use together is urgency under pressure. The word almost never describes a happy or relaxed voice. When the Bible wants to show that a situation has become unbearable, it says the people cried out, and that cry is the hinge on which rescue turns.