Allonge \Al*longe"\, n. [F. allonge, earlier alonge, a lengthening. See {Allonge}, v., and cf. {Lunge}.] 1. (Fencing) A thrust or pass; a lunge. 2. A slip of paper attached to a bill of exchange for receiving indorsements, when the back of the bill itself is already full; a rider. [A French usage] --Abbott. Allonge \Al*longe"\, v. i. [F. allonger; [`a] (L. ad) + long (L. longus) long.] To thrust with a sword; to lunge.