'Grown up' in the Bible

Then Judah said to Tamar, his daughter-in-law, "Remain a widow in your father's house, until Shelah, my son, is grown up;" for he said, "Lest he also die, like his brothers." Tamar went and lived in her father's house.

So she put off from her the garments of her widowhood and covered herself with a veil and wrapped herself up, and sat down in the entrance of, Enaim, which is by the way towards Timnah, - for she saw that Shelah had grown up, and she, had not been given him to wife.