adj. Having eight columns in the front row (of a portico etc.)
the GNU version of the Collaborative International Dictionary of English
adj. See octostyle.
The Century Dictionary and Cyclopedia
In architecture, having, or characterized by the presence of, eight columns, as a portico or a building having eight columns in front.
n. A building having eight columns in front; especially, a Greek or Roman temple having that number of columns in the front row of the portico.
Word Usage
"A third method of designating or distinguishing the temples is by the number of columns in front, thus temples are called tetrastyle, hexastyle, octastyle, that is having five, six, or eight columns."