adj. constituting, employing, dealing with, or suitable for use in incantation
the GNU version of the Collaborative International Dictionary of English
adj. Dealing by enchantment; magical.
The Century Dictionary and Cyclopedia
Dealing by enchantment; practised in incantation; magical.
Word Usage
"What some readers will call incantatory began to feel, at times, somewhat repetitive, making me appreciate those moments when a more colloquial voice, usually another speaker, was introduced in a poem, as in "An Idea of Return.""