Section 1
Part 1
Things are said to be named \'equivocally\' when, though they have a
common name, the definition corresponding with the name differs for
each. Thus, a real man and a figure in a picture can both lay claim to the
name \'animal\'; yet these are equivocally so named, for, though they have a
common name, the definition corresponding with the name differs for
each. For should any one define in what sense each is an animal, his
definition in the one case will be appropriate to that case only.
On the other hand, things are said to be named \'univocally\' which have
both the name and the definition answering to the name in common. A
man and an ox are both \'animal\', and these are univocally so named,
inasmuch as not only the name, but also the definition, is the same in both
cases: for if a man should state in what sense each is an animal, the
statement in the one case would be identical with that in the other.