Book 9
1.4
It is therefore all the more necessary to point out the distinction between the two. The name of trope is applied to the transference of expressions from their natural and principal signification to another, with a view to the embellishment of style or, as the majority of grammarians define it, the transference of words and phrases from the place which is strictly theirs to another to which they do not properly belong. A figure, on the other hand, as is clear from the name itself, is the term employed when we give our language a conformation other than the obvious and ordinary.
1.5
Therefore the substitution of one word for another is placed among tropes, as for example in the case of metaphor, metonymy, antonomasia, metalepsis, synecdochè, catachresis, allegory See VIII. vi. and, as a rule, hyperbole, which may, of course, be concerned either with words or things. Onomatopoea is the creation of a word and therefore involves substitution for the words which we should use but for such creation.
1.6
Again although periphrasis often includes the actual word whose place it supplies, it still uses a number of words in place of one. The epithet as a rule involves an element of antonomasia VIII. vi. 29 and 46. and consequently becomes a trope on account of this affinity. Hyperbaton is a change of order and for this reason many exclude it from tropes. None the less it transfers a word or part of a word from its own place to another.