Meaning

• An application for the removal of a cause or suit from an inferior to a superior judge or court for re-examination or review.

• The mode of proceeding by which such removal is effected.

• The right of appeal.

• An accusation; a process which formerly might be instituted by one private person against another for some heinous crime demanding punishment for the particular injury suffered, rather than for the offense against the public.

• An accusation of a felon at common law by one of his accomplices, which accomplice was then called an approver.

• A summons to answer to a charge.

• A call to a person or an authority for help, proof or a decision; entreaty.

  "He made an appeal for volunteers to help at the festival."

• Resort to physical means; recourse.

• Power to attract or interest.

• A call to or use of a principle or quality for purposes of persuasion.

Meaning

• To call upon another to decide a question controverted, to corroborate a statement, to vindicate one's rights, etc.

• To call on (someone) for aid

  "I appeal to all of you to help the orphans."

• (informal elsewhere) To apply for the removal of a cause from an inferior to a superior judge or court for the purpose of reexamination or for decision.

• To be attractive.

  "That idea appeals to me."

• To ask an umpire for a decision on whether a batsman is out or not, usually by saying "How's that" or "Howzat".

• To accuse (someone of something).

• To summon; to challenge.

• To invoke (used with to).