transitive verb.
To determine or express the quantity of.
transitive verb.
To limit the variables of (a proposition) by prefixing an operator such as all or some.
The Century Dictionary and Cyclopedia
To determine the quantity of; modify or determine with regard to quantity; mark with the sign of quantity: as, to quantify a syllable or a verse: more especially a term in logic.
the GNU version of the Collaborative International Dictionary of English
transitive verb.
To modify or qualify with respect to quantity; to determine, fix or express the quantity of; to rate.
transitive verb.
To make explicit the quantity of.