Source : Webster's Revised Unabridged Dictionary (1913)

Orphan \Or"phan\, n. [L. orphanus, Gr. ?, akin to L. orbus. Cf.
   {Orb} a blank window.]
   A child bereaved of both father and mother; sometimes, also,
   a child who has but one parent living.

   {Orphans' court} (Law), a court in some of the States of the
      Union, having jurisdiction over the estates and persons of
      orphans or other wards. --Bouvier.

Orphan \Or"phan\, a.
   Bereaved of parents, or (sometimes) of one parent.

Orphan \Or"phan\, v. t. [imp. & p. p. {Orphaned}; p. pr. & vb.
   n. {Orphaning}.]
   To cause to become an orphan; to deprive of parents. --Young.

Source : WordNet®

orphan
     v : deprive of parents

orphan
     adj : deprived of parents by death or desertion [syn: {orphaned}]

orphan
     n 1: a child who has lost both parents
     2: someone or something who lacks support or care or
        supervision
     3: the first line of a paragraph that is set as the last line
        of a page or column
     4: a young animal without a mother