the GNU version of the Collaborative International Dictionary of English
n. One who unfolds or explains; an expounder; an explainer.
The Century Dictionary and Cyclopedia
n. One who unfolds or explains; an expounder.
Word Usage
"My novelist friend Janet Fitch (White Oleander, Paint It Black), herself a literary explicator and connoisseur of female “badness,” was inspired to invoke those bad old days the other evening."