Real Dictionary

Ionic in American English
either of two feet consisting of four syllables, the first two long and the second two short or the first two short and the second two long
of Ionia or its people or culture; Ionian
of, or being in the form of, an ion or ions
adjective: noting or pertaining to one of the five classical orders that in ancient Greece consisted of a fluted column with a molded base and a capital composed of four volutes, usually parallel to the architrave with a pulvinus connecting a pair on each side of th
adjective: of or pertaining to ions
noun: an Ionic foot, verse, or meter

ionic in British English
adjective: of, denoting, or relating to one of the five classical orders of architecture, characterized by fluted columns and capitals with scroll-like ornaments
adjective: of, relating to, or occurring in the form of ions
noun: one of four chief dialects of Ancient Greek; the dialect spoken in Ionia