/pash"euh nl/ , adj.
1. of, pertaining to, or marked by passion.
2. caused or accompanied by passion: a passional crime.
n.
3. a book containing descriptions of the sufferings of saints and martyrs, for reading on their festivals.
[ 1400-50; late ME passionalis, equiv. to LL passion- PASSION + L -alis -AL 1 ; (n.) passionale, n. use of neut. of passionalis ]