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).

The act of making an appeal.

Having appeal; attractive.