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]