Merriam-Webster's Collegiate® Dictionary, 11th Edition
BELOW
I. adverb
Etymology: Middle English bilooghe, from bi by + looghe low, adjective
Date: 14th century
in or to a lower place,
2. on earth, in or to Hades or hell, on or to a lower floor or deck,
4. in, to, at, or by a lower rank or number, below zero , lower on the same page or on a following page, under the surface of the water,
II. preposition
Date: 1575
1. lower in place, rank, or value than ; under , down river from, south of, inferior to (as in rank), not suitable to the rank of ; beneath ,
III. noun
Date: 1697
something that is below,
IV. adjective
Date: 1916
written or discussed lower on the same page or on a following page