What is Aver?

Legal Definition
n. In old English and French. Property; substance, estate, and particularly live stock or cattle; hence a working beast; a horse or bullock.
See also
-- Black's Law Dictionary
Legal Definition
v. In pleading. To declare or assert; to set out distinctly and formally; to allege. In old pleading. To avouch or verify. Litt. ยง 691; Co. Litt. 362b. To make or prove true; to make good or justify a plea.
-- Black's Law Dictionary
Legal Definition
In Fr. To have. See Aver et tener.
-- Black's Law Dictionary
Legal Definition
To allege; to plead; to state.
-- Ballentine's Law Dictionary