Wiktionary
vb. (context idiomatic English) To become extinct.
WordNet
Usage examples of "die out".
We may not die out here, but we won't be able to make any choices.
The principle of slavery, which they tolerated under the erroneous impression that it would soon die out, became at last the dominant principle and power at the South.
Some of them die out quickly, some are merged with similar, parallel innovations created by different hackers attacking the same problem, others still are embraced, and adopted into the epic.
As to the excessive religiousness alleged against Miss Brooke, he had a very indefinite notion of what it consisted in, and thought that it would die out with marriage.
Here, in the most secure country in the world, Fear first began to die out of the natures of men, and Kindness and Fairness came to take its place.
The whole body of Marquesan poetry and music was being suffered to die out with a single dispirited generation.
And as there is nought in nature that brooks to be schooled or thwarted so ill as love, the quality of which is such that it is more likely to die out of its own accord than to be done away of set purpose, I am minded to tell you a story of a lady, who, while she sought to be more wise than became her, and than she was, and indeed than the nature of the matter, wherein she studied to shew her wisdom, allowed, thinking to unseat Love from the heart that he had occupied, and wherein perchance the stars had established him, did in the end banish at one and the same time Love and life from the frame of her son.