say it: FOH-lee-oh
folio is a noun meaning "the system of numbering pages". It carries 3 recorded senses.
the system of numbering pages
a sheet of any written or printed material (especially in a manuscript or book)
a book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages
“the first folio of Shakespeare's plays”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for folio come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.