The Collaborative International Dictionary of English v.0.48:

departing \departing\ adj.
   leaving a starting or stopping point on a journey; as,
   Departing flights were delayed by the snowstorm. Opposite of
   arriving. [prenominal]

   Syn: outbound, outward, outward-bound.
        [WordNet 1.5 +PJC]

The Collaborative International Dictionary of English v.0.48:

Depart \De*part"\, v. i. [imp. & p. p. Departed; p. pr. & vb.
   n. Departing.] [OE. departen to divide, part, depart, F.
   d['e]partir to divide, distribute, se d['e]partir to separate
   one's self, depart; pref. d['e]- (L. de) + partir to part,
   depart, fr. L. partire, partiri, to divide, fr. pars part.
   See Part.]
   1. To part; to divide; to separate. [Obs.] --Shak.
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   2. To go forth or away; to quit, leave, or separate, as from
      a place or a person; to withdraw; -- opposed to arrive; --
      often with from before the place, person, or thing left,
      and for or to before the destination.
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            I will depart to mine own land.       --Num. x. 30.
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            Ere thou from hence depart.           --Milton.
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            He which hath no stomach to this fight,
            Let him depart.                       --Shak.
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   3. To forsake; to abandon; to desist or deviate (from); not
      to adhere to; -- with from; as, we can not depart from our
      rules; to depart from a title or defense in legal
      pleading.
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            If the plan of the convention be found to depart
            from republican principles.           --Madison.
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   4. To pass away; to perish.
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            The glory is departed from Israel.    --1 Sam. iv.
                                                  21.
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   5. To quit this world; to die.
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            Lord, now lettest thou thy servant depart in peace.
                                                  --Luke ii. 29.
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   To depart with, to resign; to part with. [Obs.] --Shak.
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