Definition of "appellant"

appellant

/əˈpɛln̩t/

adjective
not comparable
1. (law) of or relating to appeals; appellate
  Quotations
  appellant jurisdiction.
  1827, Henry Hallam, The Constitutional History of England from the Accession of Henry VII. to the Death of George II. […], volumes (please specify |volume=I or II), London: John Murray, […]
2. in the process of appealing
  Quotations
  Firſt, heauen be the record to my ſpeech,In the deuotion of a ſubiects loue,Tendering the precious ſafetie of my Prince,And free from other misbegotten hate,Come I appealant to rhis [sic] Princely preſence.
  1595 December 9 (first known performance), William Shakespeare, “The life and death of King Richard the Second”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene i], page 23, column 1
noun
plural appellants
1. (law) a litigant or party that is making an appeal in court
2. One who makes an earnest entreaty of any kind.
3. (obsolete) One who challenges another to single combat.
4. (historical) One of the clergy in the Jansenist controversy who rejected the bull Unigenitus issued in 1713, appealing to a pope "better informed", or to a general council.