(1):

(v. t.) To act against with equal weight; to equal in weight; to balance the weight of; to counterbalance.

(2):

(n.) An equal power or force acting in opposition; a force sufficient to balance another force.

(3):

(n.) The relation of two weights or forces which balance each other; equilibrium; equiponderance.

(4):

(v. t.) To act against with equal power; to balance.

(5):

(n.) A weight sufficient to balance another, as in the opposite scale of a balance; an equal weight.