adverb, adjective

1. in or to a lower place; beneath
2. in a lower place on the page or on a later page (of a book, etc.)
3. in or to hell
4. on earth
5. on or to a lower floor or deck
6. in or to a lesser rank, amount, etc.
7. at a temperature lower than zero it reached 13 below

Etymology: see be- & low

1. lower than, as in position, rank, or worth
2. unworthy of it is below her to say that