Source : Webster's Revised Unabridged Dictionary (1913)

Off \Off\, 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:

   1. Denoting distance or separation; as, the house is a mile
      off.

   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.

   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.

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

   5. Denoting opposition or negation. [Obs.]

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

   {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 mimic or personate.

Off \Off\, interj.
   Away; begone; -- a command to depart.

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

   {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}, to be of a wrong color.

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.

   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.

   {Off side}.
      (a) The right hand side in driving; the farther side. See
          {Gee}.
      (b) (Cricket) See {Off}, n.

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

Source : WordNet®

off
     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: {cancelled}] [ant: {on}]
     4: in an unpalatable state; "sour milk" [syn: {sour}, {turned}]
     5: not performing or scheduled for duties; "He's off every
        Tuesday"; "he was off duty when it happened"; "an off-duty
        policeman" [syn: {off(p)}, {off duty(p)}, {off-duty(a)}]
     [also: {offer}]

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}, {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: {away}]
     3: no longer on or in contact or attached; "clean off the
        dirt"; "he shaved off his mustache"
     [also: {offer}]