Merriam-Webster Collegiate Dictionary - off

 I. adverb  Etymology: Middle English of, from Old English — more at of  Date: before 12th century  1.  a.  (1) from a place or position march ~; specifically away from land ship stood ~ to sea  (2) at a distance in space or time stood 10 paces ~ a long way ~  b. from a course ; aside turned ~ into a bypath; specifically away from the wind  c. into an unconscious state dozed ~  2.  a. so as to be separated from support rolled to the edge of the table and ~ or close contact blew the lid ~ the handle came ~  b. so as to be divided surface marked ~ into squares  3.  a. to a state of discontinuance or suspension shut ~ an engine  b. — used as an intensifier drink ~ a glass finish it ~  4. in absence from or suspension of regular work or service take time ~ for lunch  5. ~stage  II. preposition  Date: before 12th century  1.  a. — used as a function word to indicate physical separation or distance from a position of rest, attachment, or union take it ~ the table a path ~ the main walk a shop just ~ the main street  b. to seaward of two miles ~ shore  2. from the possession or charge of had his wallet stolen ~ him  3. — used as a function word to indicate the object of an action borrowed a dollar ~ him dined ~ oysters  4.  a. — used as a function word to indicate the suspension of an occupation or activity ~ duty ~ liquor  b. below the usual standard or level of ~ his game  III. adjective  Date: 1666  1.  a. seaward  b. right  c. more removed or distant the ~ side of the building  2.  a. started on the way ~ on a spree  b. not taking place or staying in effect ; canceled the deal was ~  c. not operating  d. not placed so as to permit operation  3.  a. not corresponding to fact ; incorrect ~ in his reckoning  b. poor, subnormal  c. not entirely sane ; eccentric  d. remote, slight an ~ chance  4.  a. spent ~ duty reading on his ~ days  b. marked by a periodic decline in activity or business traveled in the ~ season for lower prices  5.  a. ~-color  b. inferior ~ grade of oil; also affected with putrefaction  c. down stocks were ~  6. circumstanced worse ~  IV. verb  Date: 1717  intransitive verb to go away ; depart — used chiefly as an imperative ~, or I'll shoot  transitive verb slang kill, murder  V. abbreviation ~ice; ~icer; ~icial OFFAL  noun  Etymology: Middle English, from of off + fall  Date: 14th century  1. the waste or by-product of a process: as  a. trimmings of a hide  b. the by-products of milling used especially for stock feeds  c. the viscera and trimmings of a butchered animal removed in dressing ; variety meat  2. rubbish