1. (n.) The condition of being equivalent or equal; equality of worth, value, signification, or force; as, an equivalence of definitions.

2. (n.) Equal power or force; equivalent amount.

3. (n.) The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valence. See Valence.

4. (n.) The degree of combining power as determined by relative weight. See Equivalent, n., 2.

5. (v. t.) To be equivalent or equal to; to counterbalance.

accord accordance affinity agreement analogousness assent balance chorus coequality coextension coherence coincidence commensurability communion community comparability comparableness comparativeness compatibility concert concord concordance conformance conformation conformity congeniality congruence congruency congruity consistency consonance consort cooperation corelation correlation correlativism correlativity correspondence equality equation equilibrium equipoise equipollence equiponderance equity equivalency evenness harmony homogeneity homoousia identity indistinguishability intersection inverse proportion inverse ratio inverse relationship justice levelness likeness mutuality no difference oneness overlap par parallelism parity peace poise proportion proportionability proportionality rapport ratio reciprocality reciprocation reciprocity relativity sameness self-consistency self-identity selfhood selfness selfsameness similarity symmetry sync synchronism synonymity synonymousness synonymy tally timing uniformity union unison unisonance unity