from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Equal in force, power, effectiveness, or significance.
- adj. Logic Validly derived from each other; deducible.
- adj. Equivalent.
- n. An equivalent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. having equal power or force
- adj. able to be deduced from the other
- adj. equivalent
from the GNU version of the Collaborative International Dictionary of English
- adj. Having equal power or force; equivalent.
- adj. Having equivalent signification and reach; expressing the same thing, but differently.
from The Century Dictionary and Cyclopedia
- Having equal power or force; equivalent.
- In logic, having the same meaning: applied to two propositions.
- In mathematics, equal and parallel.
Secondly, what clear sense and significancy can be given the words without the supplement of the conditional conjunction, or some other term equipollent thereunto, Mr
(A set is reflexive iff it is equipollent to one of its proper subsets; and two sets are equipollent with one another iff there exists a bijection, i.e., a one-to-one correspondence, between them.)
In this connection mention is especially often made of Bolzano's grasp of the “paradoxical” fact that an infinite set can and must be equipollent with one of its proper subsets, i.e., is
But the evidence against doing so is at least equipollent: Bayle claims, repeatedly and unequivocally, to be a believer.
Only superstition is now so well advanced, that men of the first blood, are as firm as butchers by occupation; and votary resolution, is made equipollent to custom, even in matter of blood.
The word “equipollent” is out there, but is very rarely used.
 “Physical and moral” are taken to be terms, it seems, equipollent to
Though the term of “possibility” in the supposition, and “may” in the inference, seem to be equipollent, yet to render them of the same significancy as to the argument in hand, they must both be used in the same respect.
But there are words and phrases, both in the Old Testament and in the New, that are equipollent unto it, and express the matter or thing intended by it: as in the Old are, פּ ִדְי וֹ ן פּ ָדָה [Ps.xlix. 9], and כּ ֹפֶר.
For, in a categorical syllogism the major proposition is not to be particular, or equipollent to a particular; for, from such a proposition, when any thing communicable to more is the subject of it, and is restrained unto one particular, nothing can be inferred in the conclusion.