Existential import at Answers.com
This confuses the question of whether (A) a universal proposition like "all dragons are fire-breathing" implies what traditional logicians call the particular or I proposition "some dragons are fire-breathing ", and (B) whether the I proposition "some dragons are fire-breathing" implies the existential proposition "fire-breathing dragons exist". The first part of the definition 'the implications of a proposition as to what exists' is correct. But the second part (that the universal can be true although nothing is F) is too strong. Those of a realist disposition (such as Meinong and possibly the Phoenicians over at camp Vallicella) may hold that 'some things are F' may be true even when no F's exist.
Existential Import: The implications of a proposition as to what exists. If a proposition entails the existence of something, then it has existential import. It should be noticed that in the predicate calculus the universal quantification (∀x)(Fx → Gx) has no existential import, since it is true when nothing is F.