below

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adverb In or to a lower place; beneath.
• adverb On or to a lower floor; downstairs.
• adverb Nautical On or to a lower deck.
• adverb In a later part of a given text.
• adverb Farther down, as along a slope or valley.
• adverb In or to hell or Hades.
• adverb On the earth.
• adverb In a lower rank or class.
• adverb Below zero in temperature.
• preposition Underneath; beneath.
• preposition Lower than, as on a graduated scale.
• preposition Downstream of.
• preposition South of.
• preposition Unsuitable to the rank or dignity of.

from The Century Dictionary.

• In or to a lower place or level; beneath; downward from a higher point: as, look below; in the valley below.
• On the earth, as opposed to in the heavens.
• In hell, or the regions of the dead: as, “the realms below,” Dryden.
• On a lower floor; downstairs.
• Nautical, off duty: as, the watch below, in contradistinction to the watch on deck.
• At a later point in a page or writing; further on in the same part or division: as, particulars are given below; see the statistics below.
• Lower down in a course or direction, as toward the mouth of a river or harbor, etc.: as, the vessel has just arrived from below.
• In a lower rank or grade: as, at the trial below, or in the court below.
• Under in place; beneath; not so high as: as, below the knee.
• Lower than in position or direction; lower down: as, he lives a little below our house, that is, a little lower down the street, road, hill, etc.
• Lower than in degree, amount, weight, price, value, etc.
• Later in time than.
• Inferior in rank, excellence, or dignity: as, “one degree below kings.” Addison, Remarks on Italy, Venice.
• Too low to be worthy of; inferior to.

from the GNU version of the Collaborative International Dictionary of English.

• preposition Under, or lower in place; beneath not so high.
• preposition Inferior to in rank, excellence, dignity, value, amount, price, etc.; lower in quality.
• preposition Unworthy of; unbefitting; beneath.
• adverb In a lower place, with respect to any object; in a lower room; beneath.
• adverb On the earth, as opposed to the heavens.
• adverb In hell, or the regions of the dead.
• adverb In court or tribunal of inferior jurisdiction.
• adverb In some part or page following.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• preposition lower in spatial position than
• preposition lower in value than
• preposition downstream of
• preposition south of
• preposition unsuitable to the rank or dignity of
• preposition downstage of
• adverb in a lower place.
• adverb on a lower storey.
• adverb further down.
• adverb nautical on a lower deck.
• adverb of a temperature below zero.