The Collaborative International Dictionary of English v.0.48:

Off \Off\ ([o^]f; 115), interj.
   Away; begone; -- a command to depart.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Off \Off\, prep.
   Not on; away from; as, to be off one's legs or off the bed;
   two miles off the shore. --Addison.
   [1913 Webster]

   Off hand. See Offhand.

   Off side
   (Football), out of play; -- said when a player has got in
              front of the ball in a scrimmage, or when the ball
              has been last touched by one of his own side
              behind him.

   To be off color,
   (a) to be of a wrong color.
   (b) to be mildly obscene.

   To be off one's food or To be off one's feed, (Colloq.)
      to have no appetite; to be eating less than usual.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Off \Off\ ([o^]f; 115), adv. [OE. of, orig. the same word as R.
   of, prep., AS. of, adv. & prep. [root]194. See Of.]
   In a general sense, denoting from or away from; as:
   [1913 Webster]

   1. Denoting distance or separation; as, the house is a mile
      off.
      [1913 Webster]

   2. Denoting the action of removing or separating; separation;
      as, to take off the hat or cloak; to cut off, to pare off,
      to clip off, to peel off, to tear off, to march off, to
      fly off, and the like.
      [1913 Webster]

   3. Denoting a leaving, abandonment, departure, abatement,
      interruption, or remission; as, the fever goes off; the
      pain goes off; the game is off; all bets are off.
      [1913 Webster]

   4. Denoting a different direction; not on or towards: away;
      as, to look off.
      [1913 Webster]

   5. Denoting opposition or negation. [Obs.]
      [1913 Webster]

            The questions no way touch upon puritanism, either
            off or on.                            --Bp.
                                                  Sanderson.
      [1913 Webster]

   From off, off from; off. "A live coal . . . taken with the
      tongs from off the altar." --Is. vi. 6.

   Off and on.
      (a) Not constantly; not regularly; now and then;
          occasionally.
      (b) (Naut.) On different tacks, now toward, and now away
          from, the land.

   To be off.
      (a) To depart; to escape; as, he was off without a
          moment's warning.
      (b) To be abandoned, as an agreement or purpose; as, the
          bet was declared to be off. [Colloq.]

   To come off, To cut off, To fall off, To go off, etc.
      See under Come, Cut, Fall, Go, etc.

   To get off.
      (a) To utter; to discharge; as, to get off a joke.
      (b) To go away; to escape; as, to get off easily from a
          trial. [Colloq.]

   To take off To do a take-off on, To take off, to mimic,
      lampoon, or impersonate.

   To tell off
      (a) (Mil.), to divide and practice a regiment or company
          in the several formations, preparatory to marching to
          the general parade for field exercises. --Farrow.
      (b) to rebuke (a person) for an improper action; to scold;
          to reprimand.

   To be well off, to be in good condition.

   To be ill off, To be badly off, to be in poor condition.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Off \Off\, a.
   1. On the farther side; most distant; on the side of an
      animal or a team farthest from the driver when he is on
      foot; in the United States, the right side; as, the off
      horse or ox in a team, in distinction from the nigh or
      near horse or ox; the off leg.
      [1913 Webster]

   2. Designating a time when one is not strictly attentive to
      business or affairs, or is absent from his post, and,
      hence, a time when affairs are not urgent; as, he took an
      off day for fishing: an off year in politics. "In the off
      season." --Thackeray.
      [1913 Webster]

   3. Designating a time when one's performance is below normal;
      as, he had an off day.
      [PJC]

   Off side.
      (a) The right hand side in driving; the farther side. See
          Gee.
      (b) (Cricket) See Off, n.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Off \Off\, n. (Cricket)
   The side of the field that is on the right of the wicket
   keeper.
   [1913 Webster]

WordNet (r) 3.0 (2006):

off
    adv 1: from a particular thing or place or position (`forth' is
           obsolete); "ran away from the lion"; "wanted to get away
           from there"; "sent the children away to boarding school";
           "the teacher waved the children away from the dead
           animal"; "went off to school"; "they drove off"; "go
           forth and preach" [syn: away, off, forth]
    2: at a distance in space or time; "the boat was 5 miles off (or
       away)"; "the party is still 2 weeks off (or away)"; "away
       back in the 18th century" [syn: off, away]
    3: no longer on or in contact or attached; "clean off the dirt";
       "he shaved off his mustache"
    adj 1: not in operation or operational; "the oven is off"; "the
           lights are off" [ant: on]
    2: below a satisfactory level; "an off year for tennis"; "his
       performance was off"
    3: (of events) no longer planned or scheduled; "the wedding is
       definitely off" [syn: off, cancelled] [ant: on]
    4: in an unpalatable state; "sour milk" [syn: off, sour,
       turned]
    5: not performing or scheduled for duties; "He's off every
       Tuesday"
    v 1: kill intentionally and with premeditation; "The mafia boss
         ordered his enemies murdered" [syn: murder, slay,
         hit, dispatch, bump off, off, polish off,
         remove]

Moby Thesaurus II by Grady Ward, 1.0:

332 Moby Thesaurus words for "off":
   aberrant, abnormal, abroad, absonant, absurd, adrift, adulterated,
   all abroad, all off, all wrong, aloof, amiss, askew, astray,
   at a distance, at fault, at leisure, at liberty, at loose ends,
   atonal, available, away, awry, babbling, barring, below par,
   below standard, below the mark, bereft of reason, beside the mark,
   blast, blemished, blot out, blown, brainsick, bump off,
   cacophonous, casual, clockwise, conservative, contrasting, corrupt,
   counter, crackbrained, cracked, crazed, crazy, croak, curious,
   daft, damaged, deceptive, defective, deficient, delirious, deluded,
   delusive, demented, deprived of reason, deranged, deviant,
   deviational, deviative, dexter, dextral, dextrocardial,
   dextrocerebral, dextrocular, dextrogyrate, dextrogyratory,
   dextropedal, dextrorotary, dextrorse, diaphonic, different,
   disconsonant, discordant, discounting, disengaged, disharmonic,
   disharmonious, disoriented, disparate, dissimilar, dissonant,
   distantly, distorted, distraught, divergent, diverse, dizzy, do in,
   down, eccentric, erase, errant, erring, erroneous, except,
   excepting, exception taken of, excluding, exclusive of, extra,
   fallacious, fallible, fallow, false, fat, faultful, faulty, fix,
   flat, flawed, flighty, forth, found wanting, freaked out, freaky,
   free, from, frowy, funny, gamy, get, giddy, give the business,
   grating, gun down, hallucinated, hardly like, harsh, hence,
   heretical, heterodox, high, hit, ice, idle, illogical, illusory,
   immature, immelodious, impaired, imperfect, imprecise, impure,
   in blue water, inaccurate, inadequate, incidental, incoherent,
   incomplete, inexact, inharmonic, inharmonious, insane, irrational,
   jobless, kooky, lacking, lay out, leaving out, leisure, leisured,
   less, lightheaded, loco, lumpen, lunatic, mad, maddened, makeshift,
   manic, mazed, mediocre, mental, mentally deficient, meshuggah,
   minus, mixed, moon-struck, musicless, negligible, non compos,
   non compos mentis, nonmelodious, nonuniform, not all there,
   not counting, not perfect, not right, not true, occasional,
   oceanward, oceanwards, odd, oddball, of unsound mind, off duty,
   off soundings, off the track, off the wall, off work, off-key,
   off-tone, offbeat, offshore, otiose, out, out of employ,
   out of harness, out of pitch, out of soundings, out of tone,
   out of tune, out of work, out-of-the-way, outlandish, outside,
   over, part-time, partial, passing strange, patchy, peccant,
   peculiar, perverse, perverted, polish off, psycho, quaint, queer,
   rambling, rancid, rank, ranting, raucous, raving, reactionary,
   reasonless, reechy, remotely, right, right-hand, right-wing,
   right-wingish, rub out, save, scarcely like, seaward, seawards,
   self-contradictory, senseless, settle, sharp, short, shrill, sick,
   side, singular, sketchy, slack, slender, slight, slim, sluggish,
   small, sour, soured, spare, stale, starboard, stark-mad,
   stark-staring mad, strange, straying, strident, strong,
   substandard, tainted, take care of, tetched, thence, therefrom,
   thereof, touched, tuneless, turned, unalike, unbalanced,
   undeveloped, unearthly, unemployable, unemployed, uneven,
   unfactual, unfinished, unharmonious, unhinged, unidentical, unlike,
   unmatched, unmelodious, unmusical, unoccupied, unorthodox,
   unperfected, unproved, unresembling, unsame, unsane, unsettled,
   unsimilar, unsound, unthorough, untrue, untunable, untuned,
   untuneful, wandering, wanting, waste, weird, whence, wide,
   wipe out, without, witless, wondrous strange, wrong, zap