Pikuach nefesh, which means "saving a soul" or "saving a life," is the principle in Halakha (Jewish law) that the preservation of human life overrides virtually any other religious rule of Judaism.

the title of a piyyut and zemer (Jewish hymn).

Nefesh B'Nefesh, or Jewish Souls United, is a nonprofit organization, promotes, encourages and facilitates aliyah (Jewish immigration to Israel) from the United States and Canada.