Merriam-Webster Collegiate Dictionary - of

 I. preposition  Etymology: Middle English, ~f, ~, from Old English, adverb & preposition; akin to Old High German aba ~f, away, Latin ab from, away, Greek apo  Date: before 12th century  1. — used as a function word to indicate a point ~ reckoning north ~ the lake  2.  a. — used as a function word to indicate origin or derivation a man ~ noble birth  b. — used as a function word to indicate the cause, motive, or reason died ~ flu  c. by plays ~ Shakespeare  d. on the part ~ very kind ~ you  e. occurring in a fish ~ the western Atlantic  3. — used as a function word to indicate the component material, parts, or elements or the contents throne ~ gold cup ~ water  4.  a. — used as a function word to indicate the whole that includes the part denoted by the preceding word most ~ the army  b. — used as a function word to indicate a whole or quantity from which a part is removed or expended gave ~ his time  5.  a. relating to ; about stories ~ her travels  b. in respect to slow ~ speech  6.  a. — used as a function word to indicate belonging or a possessive relationship king ~ England  b. — used as a function word to indicate relationship between a result determined by a function or operation and a basic entity (as an independent variable) a function ~ x the product ~ two numbers  7. — used as a function word to indicate something from which a person or thing is delivered eased ~ her pain or with respect to which someone or something is made destitute robbed ~ all their belongings  8.  a. — used as a function word to indicate a particular example belonging to the class denoted by the preceding noun the city ~ Rome  b. — used as a function word to indicate apposition that fool ~ a husband  9.  a. — used as a function word to indicate the object ~ an action denoted or implied by the preceding noun love ~ nature  b. — used as a function word to indicate the application ~ a verb cheats him ~ a dollar or ~ an adjective fond ~ candy  10. — used as a function word to indicate a characteristic or distinctive quality or possession a woman ~ courage  11.  a. — used as a function word to indicate the position in time ~ an action or occurrence died ~ a Monday  b. before quarter ~ ten  12. archaic on a plague ~ all cowards — Shakespeare  II. verbal auxiliary  Etymology: by alteration  Date: circa 1800 nonstandard have — used in place ~ the contraction 've ~ten in representations ~ uneducated speech I could ~ beat them easy — Ring Lardner OF  abbreviation outfield