Noun

1. A weight sufficient to balance another, as in the opposite scale of a balance; an equal weight.
2. An equal power or force acting in opposition; a force sufficient to balance another force.
3. The relation of two weights or forces which balance each other; equilibrium; equiponderance.

Verb

1. To act against with equal weight; to equal in weight; to balance the weight of; to counterbalance.
2. To act against with equal power; to balance.